BLIND a.
ning), a level or drainage gallery which has a vertical shaft at each end, and acts as an inverted siphon. Knight. -- Blind nettle (Bot.), dead nettle. See Dead nettle, under Dead. -- Blind shell (Gunnery), a shell containing no charge, or one that does not explode. -- Blind side, the side which is most easily assai…
COELENTERA; COELENTERATA n.
A comprehensive group of Invertebrata, mostly marine, comprising the Anthozoa, Hydrozoa, and Ctenophora. The name implies that the stomach and body cavities are one. The group is sometimes enlarged so as to include the sponges.
CONVERSE n.
osition in which, after a conclusion from something supposed has been drawn, the order is inverted, making the conclusion the supposition or premises, what was first supposed becoming now the conclusion or inference. Thus, if two sides of a sides of a triangle are equal, the angles opposite the sides are equal; and the…
CORPUSCLE n.
ally, they are oval, and sometimes more or less spherical in form. In Amphioxus, and most invertebrates, the blood corpuscles are all white or colorless. -- White blood corpuscles (Physiol.), rounded, slightly flattened, nucleated cells, mainly protoplasmic in composition, and possessed of contractile power. In man, t…
DIVING a.
hich habitually lives under water; - - called also water tiger. -- Diving bell, a hollow inverted vessel, sometimes bell-shaped, in which men may descend and work under water, respiration being sustained by the compressed air at the top, by fresh air pumped in through a tube from above. -- Diving dress. See Submarine…
EPIZOON; EPIZOOEN n.
One of the artificial group of invertebrates of various kinds, which live parasitically upon the exterior of other animals; an ectozoön. Among them are the lice, ticks, many acari, the lerneans, or fish lice, and other crustaceans.