F F chemical symbol, fluorine; Fahrenheit; field of vision; formula; French (catheter size); statistical symbol for variance ratio (sometimes written as f). F-2 toxin zearalenone. F distribution the distribution of…

K K 1. chemical symbol, potassium (L. kalium); symbol for kelvin. 2. equilibrium constant. k symbol, kilo-. κ kappa, small letter; tenth letter in the Greek alphabet. K antigen see…

J J symbol for joule. J antigen the basis of the J blood group system in cattle. J chain a small polypeptide that links (joins) monomeric components of IgM and…

W W chemical symbol, tungsten (wolfram); tryptophan; watt. W/ with. Used in medical records. W-plasty a technique in tension-relieving plastic surgery used mostly for the excision of unsightly scars. The…

Q Q abbreviation for ubiquinone (CoQ). Q cycle cycle in which electrons are transferred from QH2 to cytochrome c and protons are transported into the mitochondrial intermembrane space via complex…

Z Z symbol for zetta. Z zeta, capital letter; sixth letter in the Greek alphabet; symbol for atomic number. ζ zeta, small letter; sixth letter in the Greek alphabet. Z…

X X symbol, Kienböck’s unit (of X-ray exposure). xi, small letter; fourteenth letter in the Greek alphabet. X-deletion X ovarian dysgenesis a chromosomal defect identified in mares; causes failure of…

Y Y chemical symbol, yttrium.; symbol for yotta. Y-autosome chromosomal aberration created artificially by irradiation in the process of producing sterile flies by the sterile insect release method. Y chromosome…