ROCK n.
mbilicaria Dillenii) growing on rocks in the northen parts of America, and forming broad, flat, coriaceous, dark fuscous or blackish expansions. It has been used as food in cases of extremity. -- Rock trout (Zoöl.), any one of several species of marine food fishes of the genus Hexagrammus, family Chiradæ, native of th…
ROOF n.
The surface or bed of rock immediately overlying a bed of coal or a flat vein. Bell roof, French roof, etc. (Arch.) See under Bell, French, etc. -- Flat roof. (Arch.) (a) A roof actually horizontal and level, as in some Oriental buildings. (b) A roof nearly horizontal, constructed of such material as allows the water…
SAFETY n.
t. -- Safety belt, a belt made of some buoyant material, or which is capable of being inflated, so as to enable a person to float in water; a life preserver. -- Safety buoy, a buoy to enable a person to float in water; a safety belt. -- Safety cage (Mach.), a cage for an elevator or mine lift, having appliances to…
SALT a.
alt block, an apparatus for evaporating brine; a salt factory. Knight. -- Salt bottom, a flat piece of ground covered with saline efforescences. [Western U.S.] bartlett. -- Salt cake (Chem.), the white caked mass, consisting of sodium sulphate, which is obtained as the product of the first stage in the manufacture of…
SAND n.
lley (Ammocrypta pellucida). -- Sand dollar (Zoöl.), any one of several species of small flat circular sea urchins, which live on sandy bottoms, especially Echinarachnius parma of the American coast. -- Sand drift, drifting sand; also, a mound or bank of drifted sand. -- Sand eel. (Zoöl.) (a) A lant, or launce. (b)…