SPECULUM n.
d on the distal portions of the secondary quills, and is much more brilliant in the adult male than in the female. Speculum metal, a hard, brittle alloy used for making the reflectors of telescopes and other instruments, usually consisting of copper and tin in various proportions, one of the best being that in which th…
SPERMATOZOID n.
The male germ cell in animals and plants, the essential element in fertilization; a microscopic animalcule-like particle, usually provided with one or more cilia by which it is capable of active motion. In animals, the familiar type is that of a small, more or less ovoid head, with a delicate threadlike cilium, or tail…
SPERMIST n.
A believer in the doctrine, formerly current, of encasement in the male (see Encasement), in which the seminal thread, or spermatozoid, was considered as the real animal germ, the head being the true animal head and the tail the body.
SPINDLE n.
turning lathe. -- Spindle shell. (Zoöl.) See Spindle, 7. above. -- Spindle side, the female side in descent; in the female line; opposed to spear side. Ld. Lytton. [R.] "King Lycaon, grandson, by the spindle side, of Oceanus." Lowell. -- Spindle tree (Bot.), any shrub or tree of the genus Eunymus. The wood of E. Eu…
SPRING n.
l, elegant American 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 (Zo…