Tho-mi´sus cit´re-us.

Ti-mor´.

Top´knots. Crests or tufts of feathers growing on the heads of birds.

Toxalbu´min [Gr. toxikon, poison; albumin, < Lat. albus, white.]

Tri-as´sic [Gr. trias, three.]

Tri´lo-bites [Gr. treis, three; lobos, lobe.]

Tu-ni-ca´ta [Lat. tunica, tunic.] A class of Chordata called Sca-squirts or Ascidians.

Tynes [AS. tind, prong.] The spike or prong of an antler.

Un-gu-la´ta [Lat. unguis, nail.] The order of hoofed mammals.

U-ro-de´la [Gr. oura, tail; delos, manifest.] The tailed Amphibians.