IDENTIFICA´TION, _n._ Act or process of determining to what species a
specimen or a name belongs; the determination so made.
IDEN´TIFY. To determine the name of a specimen or of a species; to
ascertain the identity of a certain specimen with a name, or name with a
certain species.
IGNO´BLE, _a._ Said of hawks lacking the special qualities of those used
in falconry.
IL´EUM, _n._ Lower portion of small intestine.
IL´IAC, _a._ Relating to the ilium, or haunch-bone; also, to the ileum.
IL´IUM, _n._ Haunch-bone; principal bone of the pelvis, forming with the
ischium and pubis the _os innominatum_.
IM´BRICATED, _a._ Fixed shingle-wise with overlapping edge or end.
IMMAC´ULATE, _a._ Unspotted; not marked with different colors.
IMMATURE´, _a._ Not having yet assumed final size, shape, color, or
other conditions of the adult.
IMPER´FORATE, _a._ Not pierced through; also, closed up (said chiefly of
the nostrils).
IMPLACEN´TAL, _a._ Having no placenta. Birds are _implacental_.
INCISED´, _a._ Cut out; cut away.
INCUBA´TION, _n._ Act of setting on eggs to hatch them.
INCUM´BENT, _a._ Depressed or bending down upon something; laid at full
length; chiefly said of the hind-toe when its whole length rests on the
ground or other support, owing to its low insertion on the level of the
rest. (131.)
IN´CUS, _a._ A bone of the inner ear of mammalia, held by high authority
to be homologous with the _os quadratum_ of birds (which see). See also
MALLEUS.
IN´DEX, _n._ The principal digit of the wing is often so called, but is
really homologous with the third or middle finger of mammals; the pollex
or so-called thumb of birds being the homologue of the mammalian index.
IN´DOLES, _n._ Natural disposition.