CARDINAL a.
rincipal points of the compass, or intersections of the horizon with the meridian and the prime vertical circle, north, south east, and west. (b) (Astrol.) The rising and setting of the sun, the zenith and nadir. -- Cardinal signs (Astron.) Aries, Lidra, Cancer, and Capricorn. -- Cardinal teeth (Zoöl.), the central t…
COMPOSITE a.
ber (Math.), one which can be divided exactly by a number exceeding unity, as 6 by 2 or 3.prime number. -- Composite photograph or portrait, one made by a combination, or blending, of several distinct photographs. F. Galton. -- Composite sailing (Naut.), a combination of parallel and great circle sailing. -- Composi…
DETONATING a.
e of mercury, which when struck, explodes with violence and a loud report. -- Detonating primer, a primer exploded by a fuse; -- used to explode gun cotton in blasting operations. -- Detonating tube, a strong tube of glass, usually graduated, closed at one end, and furnished with two wires passing through its sides a…
DIURNAL n.
A small volume containing the daily service for the "little hours," viz., prime, tierce, sext, nones, vespers, and compline.
FRICTION n.
te of potassium, antimony, sulphide, etc, which readily ignites by friction. -- Friction primer, Friction tube, a tube used for firing cannon by means of the friction of a roughened wire in the friction powder or composition with which the tube is filled -- Friction wheel (Mach.), one of the wheels in frictional geari…
GASTRAEA n.
A primeval larval form; a double-walled sac from which, according to the hypothesis of Haeckel, man and all other animals, that in the first stages of their individual evolution pass through a two-layered structural stage, or gastrula form, must have descended. This idea constitutes the Gastræa theory of Haeckel. See G…