In electricity, the symbol for admittance, in alternating-current circuits. See admittance, 6.[lowercase] An abbreviation of yard.[lowercase or cap.] A corruption of the Anglo-Saxon character , equivalent to th, giving ye for the or thee; and, by contraction, ym for them; yn for then; yr for their; ys for this; yt for that. See def. 1.The twenty-fifth letter in the English alphabet.As a symbol:In chem., the symbol of yttrium.In ornithology, in myological formulas, the symbol of the accessory semitendinosus.In mathematics:[lowercase] In algebra, the second of the variables or unknown quantities.[lowercase] In analytical geometry, the symbol of the ordinate or other rectilinear point-coördinate.In mechanics, the component of a force in the direction of the axis of y.As a medieval Roman numeral, the symbol for 150, and with a line drawn above it (Y), 150,000.[lowercase] An abbreviation of year.n. Something resembling the letter Y in shape.n. An old mode of writing the pronoun I.n. See i-. For Middle English words with this prefix, see i-, or the form without the prefix.n. A very common suffix used to form adjectives from nouns, and sometimes from verbs, such adjectives denoting ‘having,’ ‘covered with,’ ‘full of,’ etc., the thing expressed by the noun, as in stony, rocky, icy, watery, rainy, dewy, meaty, juicy, mealy, salty, peppery, powdery, flowery, spotty, speckly, etc.n. A diminutive suffix, appearing chiefly in childish names of animals, etc., as kitty, doggy, piggy, birdy, froggy, mousy, and similar names, or familiar forms of personal names, as Katy or Kitty (diminutive of Kate), Jenny, Hetty, Fanny, Willy, Johnny, Tommy, etc., such names being often spelled with -ie, as Willie, Davie, etc., a spelling common in Scotch use, and also in general use in names of girls, as Katie, Jennie, Hettie, Carrie, Lizzie, Nellie, Annie, etc.n. A termination of nouns from the Latin or Greek, or of modern formation on the Latin or Greek model.