Dictionary of Medical Acronyms & Abbreviations

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[ L ]

L₁ | L₂ | L₃ | L₄ | L₅ | L₆ |

LC₀ maximum sublethal concentration
LC₅₀ median lethal concentration
LCA Leber congenital amaurosis; left carotid artery; left circumflex artery; left coronary artery; leukocyte common antigen; lithocholic acid; liver cell adenoma; lymphocyte chemotactic activity
LCa low calcium [diet]
LCAH lipoid congenital adrenal hyperplasia
LCAL large-cell anaplastic lymphoma
LCAM liver cell adhesion molecule
L1CAM L1CAM Mutation Database
LCAO linear combination of atomic orbitals
L-CAPS Low-Density Lipoprotein Coronary Atherosclerosis Prospective Study
LCAR late cutaneous anaphylactic reaction
LCAS Lipoprotein and Coronary Atherosclerosis Study
LCAT lecithin cholesterol acyltransferase
LCATA lecithin cholesterol acetyltransferase alpha
LCB Laboratory of Cancer Biology; Leber congenital blindness; left costal border; lymphomatosis cutis benigna
LCBF local cerebral blood flow
LCBI laboratory-confirmed bloodstream infection
LCC lactose coliform count; left circumflex coronary (artery); left common carotid; left coronary cusp; life cycle cost [analysis]; lipid-containing cell; liver cell carcinoma; L-type calcium channel
LCCA late cortical cerebellar atrophy; leukoclastic angiitis
LCCME Liaison Committee on Continuing Medical Education
LCCS lower cervical cesarean section
LCCSCT large-cell calcifying Sertoli cell tumor
LCD lattice corneal dystrophy; liquid crystal diode; liquid crystal display; coal tar solution [liquor carbonis detergens]; localized collagen dystrophy; low-calcium diet
LC-DCP low contact dynamic compression plate
LCDD light chain deposition disease
LCDV lymphocystis disease virus
LCE leg cycle ergometry
LCED liquid chromatography with electrochemical detection
LCF least common factor; left circumflex [coronary artery]; lymphocyte culture fluid
LCFA, L-cFA long-chain fatty acid
LCFU leukocyte colony-forming unit
LCG Langerhans cell granule; Langerhans cell granulomatosis
LCGL large-cell granulocytic leukemia
LCGME Liaison Committee on Graduate Medical Education
LCGR lutropin-choriogonadotropin receptor
LCGU local cerebral glucose utilization
LCH Langerhans cell histiocytosis
LCh Licentiate in Surgery
L-CHAD long-chain 3-hydroxyacyl coenzyme A dehydrogenase
LCI length complexity index
LCIN low-grade cervical intraepithelial neoplasia
LCIS lobular carcinoma in situ
LCL lateral collateral ligament; left coronary leaflet; Levinthal-Coles-Lillie [body]; lower confidence limit; lower control limit; lymphoblastoid cell line; lymphocytic lymphosarcoma; lymphoid cell line
LCLC large-cell lung carcinoma
LCLo lowest lethal concentration
LCM laser-capture microdissection; latent cardiomyopathy; left costal margin; leukocyte-conditioned medium; lowest common multiple; lymphatic choriomeningitis; lymphocytic choriomeningitis
LCME Liaison Committee on Medical Education
LCMG long-chain monoglyceride
L/cm H₂O liters per centimeter of water
LC-MS liquid chromatography-mass spectrometry
LC/MS liquid chromatography/mass spectrometry
LCMV lymphocytic choriomeningitis virus
LCN lateral cervical nucleus; left caudate nucleus; line correlated noise; lipocalin
LCNB large core needle biopsy
LCO left coronary ostium; low cardiac output
LCOS low cardiac output syndrome
LCP Legg-Calve-Perthes [syndrome]; long-chain polysaturated [fatty acid]; lymphocyte cytosol polypeptide
LCPD Legg-Calve-Perthes disease
LCPS Licentiate of the College of Physicians and Surgeons
LCQ Learning Climate Questionnaire
LCR late cutaneous reaction; lifetime clinical record; ligase chain reaction; locus control region [genomic sequencing]; long control region
Lcr low calcium response
LCRB locus control region beta
LCRI limit cycle reciprocal interaction
LCRUS Leigh Clinical Research Unit Study
LCrv retroventral lateral cortex
LCS cerebrospinal fluid [Lat. liquor cerebrospinalis]; laboratory of computer science; laparoscopic coagulating shear; left coronary sinus; Leydig cell stimulation; lichen chronicus simplex; life care service; Life Closure Scale; longest common substring; low constant suction; low continuous suction; lymphocyte culture supernatants
LCSB Liaison Committee for Specialty Boards
LCSC local community service centre [Canada]
LCSD left cardiac sympathetic denervation
LCSG Lung Cancer Study Group
LCSS lethal congenital contracture syndrome
LcSSc limited cutaneous systemic sclerosis
LCST low critical solution temperature
LCSW licensed clinical social worker
LCT laser dynamic compliance measurement technique; liquid crystal thermography; liver cell tumor; long-chain triglyceride; lymphocytotoxicity; lymphocytotoxin
LCt₅₀ median lethal vapor or aerosol concentration
LCTA lymphocytotoxic antibody
LCU laparoscopic contact ultrasonography; life change unit
LCuV leaf curl virus
LCV Lake Clarendon virus; lecithovitellin; leukocytoclastic vasculitis; lymphocytic choriomeningitis virus
LCWI left cardiac work index
LCX left circumflex [coronary artery]
LCXB left [coronary] circumflex branch
LD label dictionary; labor and delivery; laboratory data; labyrinthine defect; lactate dehydrogenase; Lafora disease; L-dopa (levodopa); laser Doppler; learning disability; learning disorder; left deltoid; Legionnaires' disease; lethal dose; levodopa; light differentiation; limited disease; linear dichroism; linear discriminate; linguodistal; linkage disequilibrium; lipodystrophy; liver disease; living donor; loading dose; Lombard-Dowell [agar]; longitudinal diameter; low density; low dose; Lyme disease; lymphocyte-defined; lymphocyte depletion
L-D Leishman-Donovan [body]
L/D light/darkness [ratio]
L&D labor and delivery
LD₁ isoenzyme of lactate dehydrogenase found in the heart, erythrocytes, and kidneys
LD₂ isoenzyme of lactate dehydrogenase found in the lungs
LD₃ isoenzyme of lactate dehydrogenase found in the lungs
LD₄ isoenzyme of lactate dehydrogenase found in the liver
LD₅ isoenzyme of lactate dehydrogenase found in the liver and muscles
LD₅₀ median lethal dose
LD_50/30 a dose that is lethal for 50% of test subjects within 30 days
LD₁₀₀ lethal dose in all exposed subjects
Ld Leishmania donovani
LDA laser Doppler anemometry; left dorso-anterior [fetal position]; linear discriminant analysis; low density area; lymphocyte-dependent antibody
LDAC low-dose cytosine arabinoside
LDAR latex direct agglutination reaction
LDB lamb dysentery bacillus; Legionnaires' disease bacillus; Location Database [genetics]
LDC lactose digestion capacity; limited assistance dialysis center; lymphoid dendritic cell; lysine decarboxylase
L-dC L-deoxycytidine
LDCC lectin-dependent cellular cytotoxicity
LDCF lymphocyte-derived chemotactic factor
LDCI low-dose continuous infusion
LDCMC Lady Davis Carmel Medical Center
LdCPV Lymantria dispar cypovirus
LDCT late distal cortical tubule
LDD late dedifferentiation; light-dark discrimination; liquefy, digest, and discharge
LDDB London Dysmorphology Database
LDDE low-dose dobutamine echo
LDER lateral-view dual-energy radiography
LD-EYA Lombard-Dowell egg yolk agar
LDF laser Doppler flowmetry; laser Doppler flux, laser Doppler fluxometry; limit dilution factor
LDFA linear discrimination functional analysis
LDG lactic dehydrogenase; limit grid displacement; lingual developmental groove
L-dG L-deoxyguanosine
LDH lactate dehydrogenase; low-dose heparin
LDHA lactic dehydrogenase A
LDHB lactic dehydrogenase-B
LDHC lactic dehydrogenase-C
LDHSPS Low Dose Heparin Stroke Prevention Study
LD im lethal intramuscular dose
LD ip lethal intraperitoneal dose
LDL loudness discomfort level; low-density lipoprotein
LDLA low-density lipoprotein apheresis
LDL A low-density lipoprotein receptor class A
LDL B low-density lipoprotein receptor class B
LDL-C, LDL-c low-density lipoprotein/cholesterol complex
LDL/HDL low-density lipoproteins/high-density lipoproteins ratio
LD_Lo lowest lethal dose
LDLP low-density lipoprotein
LDLR, LDL-R low-density lipoprotein receptor; Low-Density Lipoprotein Receptor Mutation Database
LDM lactate dehydrogenase, muscle; limited dorsal myeloschisis
LDMF latissimus dorsi myocutaneous flap
LD-NEYA Lombard-Dowell neomycin egg yolk agar
L-DOPA, L-dopa [levo-3, 4-dihydroxyphenylalanine] levodopa
LDP left dorsoposterior [fetal position]; lumbodorsal pain
LDR labor, delivery, recovery; lifetime data repository; low dose rate
LDRI leukotriene D4 receptor inhibitors
LDRPS labor-delivery-recovery-postpartum suite
LDRS labor-delivery-recovery suite
LDS Licentiate in Dental Surgery; lightweight decontamination system; Lipids in Diabetes Study; locked door seclusion
LDSc Licentiate in Dental Science
LDT left dorsotransverse [fetal position]
LDUB long double upright brace
LDUH low-dose unfractionated heparin
LDV lactate dehydrogenase-elevating virus, lactic dehydrogenase virus; large dense-cored vesicle; laser Doppler velocimetry; lateral distant view; Le Dantec virus; Lordsdale virus
LE lactate extraction; law enforcement; left ear; left eye; leukocyte elastase; leukoerythrogenic; life expectancy; linkage equilibrium [population genetics]; live embryo; Long Evans [rat]; low exposure; lower extremity; lupus erythematosus [cell]
LEA lower extremity amputation; lumbar epidural anesthesia
LEADER® Lightweight Epidemiological Advanced Detection and Emergency Response System
LEAF layman education and activation system
LEAP Lower Extremity Amputation Prevention [program]
LEAV Leanyer virus
LEBV Lebombo virus
LEC leprosy elimination campaign; leukoencephalitis; long Evans cinnamon [rat]; low energy cardioversion; lower esophageal contractility
LECP low-energy charged particle
LED light-emitting diode; lowest emitting dose; lupus erythematosus disseminatus
LEDC low-energy direct current
LEDV Lednice virus
LEE locus of enterocyte effacement
LEED low-energy electron diffraction
LEEDS low-energy electron diffraction spectroscopy
LEEP left end-expiratory pressure; loop electrosurgical excision procedure
LEER likelihood equivalent error
LEET Low-Energy Endotak Trial
LEF late expression factor; leukokinesis-enhancing factor; lupus erythematosus factor; lymphoid-enhanced binding fac- tor; lymphoid enhancer factor
Leg legislation; legal
LEHR lifetime electronic health record
LeIF leukocyte interferon
LEIS low-energy ion scattering
LELC lymphoepithelioma-like carcinoma
LEL lower explosive limit; lowest effect level
LEM lateral eye movement; Leibovitz-Emory medium; leukocyte endogenous mediator; light electron microscope; light emission microscopy; low-electrolyte meal
LEMA least error matrix analysis
LEMO lowest empty molecular orbital
LEMS Lambert-Eaton myasthenic syndrome
Lenit lenitive
LENT late effect to normal tissues
LEOPARD lentigines, EKG abnormalities, ocular hypertelorism, pulmonary stenosis, abnormalities of genitalia, retardation of growth, and deafness [syndrome]
LEP laboratory of enteric pathogens; lethal effective phase; lipoprotein electrophoresis; low egg passage; lower esophageal pressure
Lep leptotene
LEPC local emergency planning committee
L_EPN effective perceived noise level
LEPR leptin receptor
Leq loudness equivalent
LER lysozomal enzyme release
LERG local electroretinogram
LERS learning from examples based on rough sets
LES Lambert-Eaton syndrome; Lawrence Experimental Station [agar]; Life Experiences Survey; lifestyle evaluation system; local excitatory state; Locke egg serum; low excitatory state; lower esophageal sphincter; lupus erythematosus, systemic
Les lesion
LESD Letterer-Siwe disease
LESP lower esophageal sphincter pressure
LESS lateral electrical spine stimulation
LESSD lupus erythematosus, specific skin disease
LESTR leukocyte-derived seven-transmembrane domain receptor
LET lidocaine, epinephrine, and tetracaine [solution]; linear energy transfer; Losartan Effectiveness and Tolerability [study]
LETD lowest effective toxic dose
LETS large external transformation-sensitive [protein]; Leiden Thrombophilia Study