TRIANGLE n.
A small constellation near the South Pole, containing three bright stars. Triangle spider (Zoöl.), a small American spider (Hyptiotes Americanus) of the family Ciniflonidæ, living among the dead branches of evergreen trees. It constructs a triangular web, or net, usually composed of four radii crossed by a double elast…
TYRIAN a.
Being of the color called Tyrian purple. The bright-eyed perch with fins of Tyrian dye. Pope. Tyrian purple, or Tyrian dye, a celebrated purple dye prepared in ancient Tyre from several mollusks, especially Ianthina, Murex, and Purpura. See the Note under Purple, n., 1, and Purple of mollusca, under Purple, n.…
UNDULATORY a.
nt impressions on the retina according to their amplitude and frequency, the sensation of brightness depending on the former, that of color on the latter. The undulations are supposed to take place, not in the direction of propagation, as in the air waves constituting sound, but transversely, and the various phenomena…
WART n.
ular excrescence or hardened protuberance on plants. Fig wart, Moist wart (Med.), a soft, bright red, pointed or tufted tumor found about the genitals, often massed into groups of large size. It is a variety of condyloma. Called also pointed wart, venereal wart. L. A. Duhring. -- Wart cress (Bot.), the swine's cress.…