GYPSY MOTH; GIPSY MOTH n.
eastern Massachusetts about 1869, where its caterpillars have done great damage to fruit, shade, and forest trees of many kinds. The male gypsy moth is yellowish brown, the female white, and larger than the male. In both sexes the wings are marked by dark lines and a dark lunule. The caterpillars, when full- grown, hav…
HARD a.
Having disagreeable and abrupt contrasts in the coloring or light and shade. Hard cancer, Hard case, etc. See under Cancer, Case, etc. -- Hard clam, or Hard-shelled clam (Zoöl.), the guahog. -- Hard coal, anthracite, as distinguished from bituminous or soft coal. -- Hard and fast. (Naut.) See under Fast. -- Hard fi…
HYOSCYAMINE n.
ctive principle. It is also found with other alkaloids in the thorn apple and deadly nightshade. It is extracted as a white crystalline substance, with a sharp, offensive taste. Hyoscyamine is isomeric with atropine, is very poisonous, and is used as a medicine for neuralgia, like belladonna. Called also hyoscyamia, du…
IMMERSION n.
tail body, by passing either behind another, as in the occultation of a star, or into its shadow, as in the eclipse of a satellite; -- opposed to emersion. Immersion lens, a microscopic objective of short focal distance designed to work with a drop of liquid, as oil, between the front lens and the slide, so that this l…