TORTOISE n.
articles. -- Tortoise-shell butterfly (Zoöl.), any one of several species of handsomely colored butterflies of the genus Aglais, as A. Milberti, and A. urticæ, both of which, in the larva state, feed upon nettles. -- Tortoise-shell turtle (Zoöl.), the hawkbill turtle. See Hawkbill.
TRAGOPAN n.
one of several species of Asiatic pheasants of the genus Ceriornis. They are brilliantly colored with a variety of tints, the back and breast are usually covered with white or buff ocelli, and the head is ornamented with two bright-colored, fleshy wattles. The crimson tragopan, or horned pheasant (C. satyra), of India…
TRAP n.
An old term rather loosely used to designate various dark- colored, heavy igneous rocks, including especially the feldspathic- augitic rocks, basalt, dolerite, amygdaloid, etc., but including also some kinds of diorite. Called also trap rock. Trap tufa, Trap tuff, a kind of fragmental rock made up of fragments and eart…
ULTRAMARINE n.
e quantities by fusing together silica, alumina, soda, and sulphur, thus forming a glass, colored blue by the sodium polysulphides made in the fusion. Also used adjectively. Green ultramarine, a green pigment obtained as a first product in the manufacture of ultramarine, into which it is changed by subsequent treatment…