REFRACTION n.
efraction (Opt.), the refraction of light in two directions, which produces two distinct images. The power of double refraction is possessed by all crystals except those of the isometric system. A uniaxial crystal is said to be optically positive (like quartz), or optically negative (like calcite), or to have positive,…
REGENT n.
head, neck, and large patches on the wings, bright golden yellow, and the rest of the plumage deep velvety black; -- so called in honor of the Prince of Wales (afterward George IV.), who was Prince Regent in the reign of George III. -- The Regents of the University of the State of New York, the members of a corporate…
SCALE n.
hey are found upon the leaves and twigs of various trees and shrubs, and often do great damage to fruit trees. See Orange scale,under Orange. -- Scale moss (Bot.), any leafy-stemmed moss of the order Hepaticæ; -- so called from the small imbricated scalelike leaves of most of the species. See Hepatica, 2, and Jungerma…
SCATH n.
Harm; damage; injury; hurt; waste; misfortune. [Written also scathe.] But she was somedeal deaf, and that was skathe. Chaucer. Great mercy, sure, for to enlarge a thrall, Whose freedom shall thee turn to greatest scath. Spenser. Wherein Rome hath done you any scath, Let him make treble satisfaction. Shak.…