Dictionary of Medical Acronyms & Abbreviations

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[ L ]

L₁ | L₂ | L₃ | L₄ | L₅ | L₆ |

L angular momentum; Avogadro constant; boundary [Lat. limes]; coefficient of induction; diffusion length; inductance; Lactobacillus; lambda; lambert; latent heat; latex; Latin; leader sequence; left; Legionella; Leishmania; length; lente insulin; lethal; leucine; levo-; lewisite; lidocaine; ligament; light; light sense; lingual; Listeria; liter; liver; low; lower; lumbar; luminance; lymph; lymphocyte; outer membrane layer of cell wall of gram-negative bacteria [layer]; pound [Lat. libra]; radiance; self-inductance; syphilis [Lat. lues]; threshold [Lat. limen]
L0 no evidence of lymph node metastases [TNM (tumor node-metastasis) classification]
L₀ limes zero [limes nul, the largest amount of toxin which will not produce a toxic reaction]
L₊ limes tod [the smallest amount of toxin which will produce a toxic reaction]
L1 acute lymphoblastic leukemia with lymphoblasts, scanty cytoplasm and inconspicuous nucleoli [FAB (Franco-American-British) classification]; lymph node metastases assessed [TNM (tumor-node-metastasis) classification]
L1, L2, L3, L4, L5 first, second, third, fourth, and fifth lumbar vertebrae
LI, LII, LIII first, second, third stage of syphilis
L2 acute lymphoblastic leukemia with large pleomorphic blasts, abundant cytoplasm, and prominent nucleoli [FAB (Franco-American-British) classification]
L₂ area [length square]
L3 acute lymphoblastic leukemia having blast with basophilic vacuolated cytoplasm [FAB (Franco-American-British) classification]
L₃ volume [length cube]
L/3 lower third
l azimuthal quantum number; left; length; lethal; levorotatory; liter; long; longitudinal; specific latent heat
Λ see lambda
λ see lambda
LA lactic acid; lactic acidemia; large amount; laser angioplasty; late abortion; late antigen; latex agglutination; left angle; left arm; left atrium; left auricle; leucine aminopeptidase; leukemia antigen; leukoagglutination; leuprolide acetate; levator ani; Lightwood-Albright [syndrome]; linear addition; linguo-axial; linoleic acid; lobuloalveolar; local anesthesia; local anesthetic; long-acting [drug]; long arm; long axis; low anxiety; Ludwig angina; lupus anticoagulant; lymphocyte antibody
L&A light and accommodation; living and active
L/A liver/aorta
LA50 total body surface area of burn that will kill 50% of patients (lethal area)
La labial; lambda; lambert; lanthanum
LAA left atrial appendage; left atrial area; left auricular appendage; leukemia-associated antigen; leukocyte ascorbic acid
LAAM L-alpha acetyl methadol; levo-alpha-acetylmethadol
LAAO L-amino acid oxidase
LA/Ao left atrial/aortic [ratio]
LAB, lab laboratory
LABA long-acting beta agonist
LabBase laboratory database
LABBB left anterior bundle branch block
LABC locally advancing breast cancer
LABE labetalol
LABP laboratory procedure [UMLS]
LA-BP low affinity binding protein
LABV left atrial ball valve
LabVISE Laboratory Reporting Scheme in Virology and Serology [Australia]
LAC La Crosse [virus]; lactase; lansoprazole, amoxicillin, clarithromycin; large area coverage; left atrial circumflex [artery]; left atrial contraction; linear attenuation coefficient; linguoaxiocervical; long-arm cast; low-amplitude contraction; lung adenocarcinoma cells; lupus anticoagulant
LaC labiocervical
Lac laceration; lactation
LACD left apex cardiogram, calibrated displacement
LACI lacidipine; lipoprotein-associated coagulation inhibitor
LACN local area communications network
LacR lactose repressor
Lacr lacrimal
LACS long chain acyl-coenzyme A synthetase
Lact lactate, lactating, lactation; lactic
Lact hyd lactalbumin hydrolysate
LACV La Crosse virus
LAD lactic acid dehydrogenase; left anterior descending [coronary artery]; left atrial defect; left axis deviation; leukocyte adhesion deficiency; ligament augmentation device; linoleic acid depression; lipoamide dehydrogenase; lymphocyte-activating determinant
LADA laboratory animal dander allergy; latent autoimmune diabetes in the adult, latent autoimmune diabetes of adults; left acromio-dorso-anterior [position]; left anterior descending artery
LADB left [coronary] descending branch
LADCA left anterior descending coronary artery
LADD lacrimo-auriculo-dento-digital [syndrome]; left anterior descending diagonal [coronary artery]
LADH lactic acid dehydrogenase; liver alcohol dehydrogenase
LAD-MIN left axis deviation, minimal
LADP left acromio-dorso-posterior [position]; left anterior descending arterial pressure
LADS Lors American Data System
LAE left atrial enlargement
LAEDV left atrial volume in end diastole
LAEI left atrial emptying index
LAESV left atrial volume in end systole
LAF laminar air flow; Latin American female; left anterior fascicle; leukocyte-activating factor; lymphocyte-activating factor
LAFB left anterior fascicular block
LAFR laminar air flow room
LAFU laminar air flow unit
LAG labiogingival; leukocyte antigen group; linguo-axiogingival; lymphangiogram; lymphocyte activation gene
LaG labiogingival
LAH lactalbumin hydrolysate; left anterior hemiblock; left atrial hypertrophy; Licentiate of Apothecaries Hall; lithium, aluminum, hydroxide
LAHB left anterior hemiblock
LAHC low affinity-high capacity
LAHF low amplitude high frequency
LAHT laser-assisted hair transplantation
LAHV leukocyte-associated herpesvirus
LAI latex particle agglutination inhibition; leukocyte adherence inhibition
LaI labioincisal
LAID left anterior internal diameter
LAIF leukocyte adherence inhibition factor
LAIT latex agglutination inhibition test
LAK lymphokine-activated killer [cells]
LAL left axillary line; limulus amebocyte lysate; low air loss; lysosomal acid lipase
LaL labiolingual
LALB low air-loss bed
LALI lymphocyte antibody-lymphocytolytic interaction
LALL lymphomatous acute lymphoblastic leukemia
LALR lexically assign, logically refine [computer strategy]
LALV Lucerne Australian latent virus
LAM laminectomy; laminin; lamivudine; late ambulatory monitoring; Latin American male; left anterior measurement; left atrial myxoma; linear associative memory; lipoarabinomannan; lymphangioleiomyomatosis; lymphocyte adhesion molecule
Lam laminectomy
LAMA laminin A
LAMB laminin B; lentigines, atrial myxoma, mucocutaneous myxomas, blue nevi [syndrome]
L-AmB liposomal AmBisome [amphotericin]
Λ Greek capital letter lambda
λ Greek lowercase letter lambda; craniometric point; decay constant; an immunoglobulin light chain; mean free path; microliter; thermal conductivity; wavelength
LAMBR laminin B receptor
LAMC laminin C
LAMMA laser microprobe mass analyzer
LAMP limbic system-associated membrane protein; lysosome-associated membrane protein
LAN local area network; long-acting neuroleptic [agent]
LANC long-arm navicular cast
LANE lidocaine, atropine, naloxone, epinephrine [drugs that may be administered via endotracheal tube]
LANV Laguna Negra virus; left atrial neovascularization
LAO left anterior oblique; left atrial overload; Licentiate of the Art of Obstetrics
LAP laboratory accreditation program; laparoscopy; laparotomy; latency-active promoter; latency-associated protein; left arterial pressure; left atrial pressure; leucine aminopeptidase; leukemia-associated phenotype; leukemia-associated phosphoprotein; leukocyte alkaline phosphatase; liver-enriched transcriptional activator protein; low atmospheric pressure; lyophilized anterior pituitary
Lap laparoscopy; laparotomy
Lap & dye laparoscopy and injection of dye
LAPIS Late Potentials in Myocardial Infarction Study
LAPSE long-term ambulatory physiologic surveillance
LAPSS Los Angeles Prehospital Stroke Screen
LAPW left atrial posterior wall
LAR laryngology; late asthmatic response; late reaction; left arm recumbent; legally authorized representative; leukocyte antigen-related; low anterior resection
Lar larynx; left arm reclining
LARA Low-Dose Aspirin Trial on Restenosis after Angioplasty
LARab laryngeal abductor
LARad laryngeal adductor
LARC leukocyte automatic recognition computer
LARD lacrimoauriculoradiodental [syndrome]
L-Arg L-arginine
LARIS laser atomization resonance ionization spectroscopy
LARS laparoscopic antireflux surgery; laser angioplasty in the treatment of restenosis developing within coronary stents; leucyl-tRNA synthetase
Laryngol laryngology
LAS laboratory automation system; lateral amyotrophic sclerosis; laxative abuse syndrome; left anterior-superior; leucine acetylsalicylate; linear alkylsulfonate; local adaptation syndrome; long arm splint; lower abdominal surgery; lymphadenopathy syndrome; lymphangioscintigraphy
LASA linear-analogue self assessment; lipid-associated phenotype
LASAF low quantities of acetylsalicylic acid in atrial fibrillation
LASA-P linear-analogue self-assessment-Pristman
LASAR Local Alcohol and Stent Against Restenosis [trial]
LASA-S linear-analogue self-assessment-Selby
LASE laser-assisted spinal endoscopy
LASER light amplification by stimulated emission of radiation
LASH left anterior superior hemiblock
LA SI linearly additive spatially invariant [image]
LASIK laser-assisted in situ keratomileusis
L-ASP L-asparaginase
LASS labile aggregation stimulating substance
LAST Left Anterior Small Thoracotomy [study]
LASTAC laser transluminal angioplasty catheter
LASTLHY Latin American Study of Lacidipine in Hypertension
LASV Lassa virus
LAT lactic acidosis threshold; latency-associated transcript; lateral; lateral atrial tunnel; latex agglutination test; latissimus dorsi [muscle]; left anterior trigone; left atrial thrombus; less acute mode of transportation; limbal autograft transplantation; L-type amino acid transporter; lysolecithin acyltransferase
Lat Latin
Lat latent; lateral
Lat bend lateral bending
LATC lateral talocalcaneal
LATCH literature attached to charts
LATE Late Assessment of Thrombolytic Efficacy [trial]
L · atm liter atmosphere
LATP left atrial transmural pressure
LATPT left atrial transesophageal pacing test
LATS long-acting thyroid stimulator
LATS-P long-acting thyroid stimulator-protector
LATu lobulo-alveolar tumor
LAUP laser-assisted uvulopalatoplasty
LAV liquid-assisted ventilation; lymphadenopathy-associated virus
Lav lavoratory
LAVA laser angioplasty vs. angioplasty; Leiden Artificial Valves and Anticoagulation [study]
LAVH laparoscopy-assisted vaginal hysterectomy
LAW left atrial wall
LAX, LAx long axis
Lax laxative; laxity
LAX-DSS long axis-discrete subaortic stenosis
Lax oc laxative of choice
LB lamellar body; large bowel; left breast; left bronchus; left bundle; left buttock; leiomyoblastoma; lipid body; live birth; liver biopsy; loose body; low back [pain]; lung biopsy; Luria-Bertani [medium]
L&B left and below
Lb Leishmania brasiliensis; pound [Lat. libra]; pound force
LBA laser balloon angioplasty; left basal artery
LBB left bundle branch; low back bending
LBBB left bundle branch block
LBBsB left bundle branch system block
LBC lidocaine blood concentration; liquid-based cytology; lymphadenosis benigna cutis
LBCD left border of cardiac dullness
LBCF Laboratory Branch complement fixation [test]
LBD lamellar body density; large bile duct; left border of dullness; Lewy body dementia; ligand-binding domain; lower back disorder; lumbar body density
LBF Lactobacillus bulgaricus factor; limb blood flow; liver blood flow
Lbf pound force
Lbf-ft pound force foot
LBH length, breadth, height
LBI low back injury; low serum-bound iron
Lb/in² pounds per square inch
LBL labeled lymphoblast; lymphoblastic lymphoma
LbL layer-by-layer
LBM last bowel movement; lean body mass; loose bowel movement; lung basement membrane
L-BMAA L-beta-N-methylamino-L-alanine
LBMT lansoprazole, bismuth, metronidazole, tetracycline
LBNP lower body negative pressure
LBO large bowel obstruction
LBP lipopolysaccharide-binding protein; local binary pattern; low back pain; low blood pressure; lumbar back pain
LBPF long bone or pelvic fracture
LBPP lower body positive pressure
LBPQ Low Back Pain Questionnaire
LBRF louse-borne relapsing fever
LBS low back syndrome; Lübeck Blood [Pressure] Study; lumbar back strain; Lutheran Brotherhood Study; lysine-binding site
LBSA lipid-bound sialic acid
LBT low back tenderness or trouble
LBTI lima bean trypsin inhibitor
Lb tr pound troy
LBV Lagos bat virus; left brachial vein; lung blood volume
LB-V left bundle-ventricle
LBW lean body weight; low birth weight
LBWI low-birth-weight infant
LBWR lung-body weight ratio
LC Laënnec cirrhosis; Langerhans cell; laparoscopic cholecystectomy; large chromophobe; late clamped; lateral canthotomy; lateral cortex; lecithin cholesterol acyltransferase; left circumflex [coronary artery]; lethal concentration; Library of Congress; life care; light chain; linguocervical; lipid cytosomes; liquid chromatography; liquid crystal; liver cirrhosis; living children; location component; locus ceruleus; long chain; low calorie; low contrast; lower calyceal; lung cancer; lung cell; lymphocyte count

L₁ | L₂ | L₃ | L₄ | L₅ | L₆ |

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