SPECTRUM n.
acterized by dark spaces, bands, or lines. -- Chemical spectrum, a spectrum of rays considered solely with reference to their chemical effects, as in photography. These, in the usual photogrophic methods, have their maximum influence at and beyond the violet rays, but are not limited to this region. -- Chromatic spec…
SPRING n.
butterfly (Erora læta) which appears in spring. The hind wings of the male are brown, bordered with deep blue; those of the female are mostly blue. -- Spring bed, a mattress, under bed, or bed bottom, in which springs, as of metal, are employed to give the required elasticity. -- Spring beetle (Zoöl.), a snapping be…
SQUARE n.
The front of a woman's dress over the bosom, usually worked or embroidered. [Obs.] Shak. Geometrical square. See Quadrat, n., 2. -- Hollow square (Mil.), a formation of troops in the shape of a square, each side consisting of four or five ranks, and the colors, officers, horses, etc., occupying the middle. -- Least s…