The Collaborative International Dictionary of English v.0.48:
Fatty \Fat"ty\, a.
Containing fat, or having the qualities of fat; greasy;
gross; as, a fatty substance.
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
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
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