[ X ]

• X  androgenic [zone]; cross; crossbite; exophoria distance; exposure; extra; female sex chromosome; ionization exposure; ionization exposure rate; Kienböck's unit of x-ray exposure; magnification; multiplication times; reactance; removal of; respirations [anesthesia chart]; Roman numeral ten; start of anesthesia; "times"; translocation between two X chromosomes; transverse; unknown quantity; xanthosine; X unit; xylene
•   sample mean
• X², χ²  chi-square
• X3  orientation as to time, place, and person
• x  except; extremity; horizontal axis of a rectangular coordinate system; mole fraction; multiplication times; position; roentgen [rays]; sample mean; "times"; unknown factor; xanthine
• Ξ  see xi
• ξ  see xi
• XA  xanthurenic acid; x-ray analysis
• X-A  xylene and alcohol
• Xa  activated factor X; chiasma
• Xaa  unknown amino acid
• XAD  External Atrial Defibrillation [trial]
• Xam  examination
• Xan  xanthine
• Xanth  xanthomatosis
• Xao  xanthosine
• XBP  xanthophyll-binding protein; X-box binding protein
• XBSN  X-linked bulbospinal neuropathy
• XC, Xc  excretory cystogram
• X-CAR  cross-relational computer-based retention
• XCCL  exaggerated craniocaudal lateral [view]
• XCE  X-chromosome controlling element
• X-CGD  X-linked chronic granulomatous disease
• XCMD  external [computer] command
• Xcv  Xanthomonas campestris vesicatoria
• XD  x-ray diffraction
• XDH  xanthine dehydrogenase
• XDP  xanthine diphosphate; xeroderma pigmentosum
• XDR  transducer
• Xe  electric susceptibility; xenon
• XECT, XeCT  xenon-enhanced computed tomography
• XEF  excess ejection fraction
• XES  x-ray energy spectrometry
• Xfb  cross-linked Gibrin
• XFD  x-ray flat detector
• XGP  xanthogranulomatous pyelonephritis
• XGPT  xylosylprotein-4-beta-galactosyltransferase
• XGRAIL  Gene Recognition and Analysis Internet Link X window [client server system]
• Xi  inactive X chromosome
• Ξ  Greek capital letter xi
• ξ  Greek lowercase letter xi
• XIBV  Xiburema virus
• XIC  X chromosome inactivation center; X-inactivation center
• X-IEP  crossed immunoelectrophoresis
• XIMS  extensible markup language [XML] information management system
• XINV  Xingu virus
• XIP  exchanger inhibitory peptide; x-ray-induced polypeptide; x-ray in plaster
• XISHF  Xamoterol in Severe Heart Failure [study]
• XIST  inactive X chromosome specific transcript; X-inactivation specific transcript
• XL  excess lactate; X-linked [inheritance]; xylose-lysine [agar base]
• XLA, X-LA  X-linked agammaglobulinemia
• XLAS  X-linked aqueductal stenosis
• XLCM  X-linked dilated cardiomyopathy
• XLD  X-linked dominant; xylose-lysine-deoxycholate [agar]
• XLH  X-linked hydrocephalus; X-linked hypophosphatemia
• XLHED  X-linked hypohidrotic ectodermal dysplasia
• XLI  X-linked ichthyosis
• XLMR  X-linked mental retardation
• XLMTM, XLMTm  X-linked myotubular myopathy
• XLOS  X-linked Opitz syndrome
• XLP  X-linked lymphoproliferative [syndrome]
• XLPD  X-linked lymphoproliferative disease
• XLR  X-linked recessive
• XLRP  X-linked retinitis pigmentosa
• XLS  X-linked recessive lymphoproliferative syndrome
• XLSP  X-linked spastic paraplegia
• XM  crossmatch
• Xm, X^m  maternal chromosome X
• xma  chiasma
• X-mas  Christmas [factor]
• x-mat  crossmatch [blood]
• X-match  crossmatch
• XME  xenobiotic-metabolizing enzyme
• XMI  extensible markup language [XML] metadata-interchange [format]
• XML  extensible markup language
• XML-DOM  extensible markup language-document object model
• XML-DTD  extensible markup language-document type definition
• XMP  xanthine monophosphate
• XMMR  Xenopus molecular marker resource
• XMR  X-linked mental retardation
• XN  night blindness
• XO  presence of only one sex chromosome; xanthine oxidase
• XOAD  X-linked ocular albinism with deafness
• XOAN  X-linked ocular albinism of Nettleship-Falls
• XOM  extraocular movements
• XOP  x-ray out of plaster
• XOR  exclusive operating room
• XP  xanthogranulomatous pyelonephritis; xeroderma pigmentosum
• Xp  paternal chromosome X; short arm of chromosome X
• XPA  xeroderma pigmentosum group A
• XPC  xeroderma pigmentosum group C
• XPN  xanthogranulomatous pyelonephritis
• XPS  x-ray photoelectron spectroscopy; x-ray photoemission spectroscopy
• XPTB  extrapulmonary tuberculosis
• Xq  long arm of chromosome X
• XR  extended release; xeroradiography; X-linked recessive [inheritance]; x-ray
• x-rays  roentgen rays
• XRD  x-ray diffraction
• XRE  xenobiotic response element
• XRF  x-ray fluorescence
• XRFDC  x-ray film digitization console
• XRII  x-ray image intensifier
• XRMR  X-linked recessive mental retardation
• XRN  X-linked recessive nephrolithiasis
• XRS  x-ray sensitivity
• XRT  x-ray therapy
• XS  cross-section; excessive; xiphisternum
• X/S  cross-section
• xs  excess
• XSA  cross-section area
• XSCID  X-linked severe combined immunodeficiency [syndrome]
• XSCLH  X-linked subcortical laminar heterotopia
• X-sect  cross-section
• XSL  extensible stylesheet language
• XSP  xanthoma striatum palmare
• XT  exotropia
• Xt  extra toe
• Xta  chiasmata
• Xtab  cross-tabulating
• XTE  xeroderma, talipes, and enamel defect [syndrome]
• XTM  xanthoma tuberosum multiplex
• XTP  xanthosine triphosphate
• X-TUL  external tumescent ultrasound liposculpture
• XU  excretory urogram; X unit
• Xu  X-unit
• X_u  cumulative amount of urine
• XUC  extended use case [format]
• XuMP  xylulose monophosphate
• Xu5P, Xu5p  xylulose-5-phosphate
• XX  chromosome X disomy; double strength; female chromosome type
• 46, XX  46 chromosomes, 2 X chromosomes (normal female)
• XXL  xylocaine
• XXX  chromosome X trisomy
• XXXX  chromosome X tetrasomy
• XXXXX  chromosome X pentasomy
• XX/XY  sex karyotypes
• XY  male chromosome type
• 46, XY  46 chromosomes, 1 X and 1 Y chromosome (normal male)
• Xyl  xylose
  

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