FLASK n.
part flask, four part flask, etc. Erlenmeyer flask, a thin glass flask, flat-bottomed and cone-shaped to allow of safely shaking its contents laterally without danger of spilling; -- so called from Erlenmeyer, a German chemist who invented it. -- Florence flask. Etym: [From Florence in Italy.] (a) Same as Betty, n., 3…
FRICTION n.
a piece on another shaft that the two will revolve together; as, in the illustration, the cone a on one shaft, when thrust forcibly into the corresponding hollow cone b on the other shaft, compels the shafts to rotate together, by the hold the friction of the conical surfaces gives. (b) A toothed clutch, one member of…
FRUSTUM n.
a solid next the base, formed by cutting off the, top; or the part of any solid, as of a cone, pyramid, etc., between two planes, which may be either parallel or inclined to each other.
GEOMETRY n.
plane surface, solids bounded by plane surfaces, the sphere, the cylinder, and the right cone. -- Higher geometry, that pert of geometry which treats of those properties of straight lines, circles, etc., which are less simple in their relations, and of curves and surfaces of the second and higher degrees.…
GUTTA n.
One of a series of ornaments, in the form of a frustum of a cone, attached to the lower part of the triglyphs, and also to the lower faces of the mutules, in the Doric order; -- called also campana, and drop. Gutta serena Etym: [L., lit. serene or clear drop] (Med.), amaurosis. -- Guttæ band (Arch.), the listel or ban…