Part 182

TRUN´CATE, a. Cut squarely off.

TRUN´CUS, n. Trunk; body without its members. (56.)

TUBER´CULUM, n. Tubercle; a little lump or elevation.

TU´NIC, n. Enveloping membrane of various organs.

TU´NICA ALBUGIN´EA, n. Dense whitish membranous investment of the testicles.

TUR´BINAL, a. Scroll-like; name of certain bones of nasal passages.

TYLAR´I, n. pl. Pads under the toes. (123.)

TYM´PANIC (bone), a. for n. Same as OS QUADRATUM (which see).

TYM´PANUM, n. Ear-drum. Also, the naked inflatable air-sacs on the sides of the neck of grouse, an enlargement of the ordinary cervical reservoirs of air which communicate with the bronchi.

TYPE, n. Way; plan; mode. Also, sign or symbol. The type, or typical form, of a group is that which exhibits a given set of characters most perfectly. But the type of a genus is usually the species, if any, from which the generic characters were especially drawn up, without reference to such qualification; while, furthermore, the type of a species, in current acceptation, is merely the specimen from which the species was originally described, even though it may very inadequately represent such species.

TYP´ICAL, a. Of most usual structure; adhering strictly to a given plan of structure. (But compare TYPE.)

UL´NA, n. Inner or posterior bone of forearm.

UL´NAR, a. Pertaining to the ulna.

UMBIL´ICAL, a. Relating to the umbilicus.

UMBIL´ICATE, a. Pitted, as if with an umbilicus.

UMBILI´CUS, n. Navel. Pitted scar, indicating point of entrance of placental vessels into the fœtus. Also, any similar pit or depression, as that on the scape of a feather at junction of rhachis and calamus.

UNARMED TOE. Toe bearing no claw. See DIGITUS MUTICUS. (133.)

UN´CIFORM, a. Hooked.

UNDER JAW. See MANDIBULUM.

UNDER PARTS. See GASTRÆUM.

UNDER TAIL-COVERTS. (13.) See CRISSUM.

UNDER WING-COVERTS. (84.) See TECTRICES.

UNDULA´TION, n. Wavy color-marks.

UNGUIC´ULATE, a. Clawed.

UNGUIS, n.; pl. ungues. Claw.

UNIP´AROUS, a. Producing but one young. Same as monotokous.

UPPER BACK. (58.) See INTERSCAPILIUM.

UPPER JAW. (10.) See MAXILLA.