Fatty acid (Chem.), any one of the paraffin series of monocarbonic acids, as formic acid, acetic, etc.; -- so called because the higher members, as stearic and palmitic acids, occur in the natural fats, and are themselves fatlike substances. -- Fatty clays. See under Clay. -- Fatty degeneration (Med.), a diseased condition, in which the oil globules, naturally present in certain organs, are so multiplied as gradually to destroy and replace the efficient parts of these organs. -- Fatty heart, Fatty liver, etc. (Med.), a heart, liver, etc., which have been the subjects of fatty degeneration or infiltration. -- Fatty infiltration (Med.), a condition in which there is an excessive accumulation of fat in an organ, without destruction of any essential parts of the latter. -- Fatty tumor (Med.), a tumor consisting of fatty or adipose tissue; lipoma.
Containing fat, or having the qualities of fat; greasy; gross; as, a fatty substance. [1913 Webster]
fatty, adj. & n.
--adj. (fattier, fattiest)
1 like fat; oily, greasy.
2 consisting of or containing fat; adipose.
3 marked by abnormal deposition of fat, esp. in fatty degeneration.
--n. (pl. -ies) colloq. a fat person (esp. as a nickname).
fatty acid Chem. any of a class of organic compounds consisting of a hydrocarbon chain and a terminal carboxyl group, esp. those occurring as constituents of lipids. fatty oil = fixed oil.
fattily adv. fattiness n.
adipose, blimp, blubbery, buttery, butyraceous, chrismal, chrismatory, fat, greasy, heavy, heavyweight, hippo, lardaceous, lardy, lump, mucoid, oily, oleaginous, oleic, potbelly, rich, roly-poly, sebaceous, sleek, slick, slippery, smooth, soapy, suety, swagbelly, tallowy, tub, tub of lard, tun, unctuous, unguent, unguentary, unguentous
unctuousness, unctuosity, lubricity, ointment, anointment, lubrication, unctuous, oily, oleaginous, adipose, sebaceous, unguinous, fat, fatty
, greasy, waxy, butyraceous, soapy, saponaceous, pinguid, lardaceous, slippery.