RIVER n.
(Zoöl.), an African puff adder (Clotho nasicornis) having a spine on the nose. -- River limpet (Zoöl.), a fresh-water, air-breathing mollusk of the genus Ancylus, having a limpet-shaped shell. -- River pirate (Zoöl.), the pike. -- River snail (Zoöl.), any species of fresh-water gastropods of Paludina, Melontho, and…
ROCK n.
the cress kind found on rocks, as Arabis petræa, A. lyrata, etc. -- Rock crystal (Min.), limpid quartz. See Quartz, and under Crystal. -- Rock dove (Zoöl.), the rock pigeon; -- called also rock doo. -- Rock drill, an implement for drilling holes in rock; esp., a machine impelled by steam or compressed air, for drill…
TEAR n.
A drop of the limpid, saline fluid secreted, normally in small amount, by the lachrymal gland, and diffused between the eye and the eyelids to moisten the parts and facilitate their motion. Ordinarily the secretion passes through the lachrymal duct into the nose, but when it is increased by emotion or other causes, it…
WATER n.
The limpidity and luster of a precious stone, especially a diamond; as, a diamond of the first water, that is, perfectly pure and transparent. Hence, of the first water, that is, of the first excellence.