RICOCHET n.
A rebound or skipping, as of a ball along the ground when a gun is fired at a low angle of elevation, or of a fiat stone thrown along the surface of water. Ricochet firing (Mil.), the firing of guns or howitzers, usually with small charges, at an elevation of only a few degrees, so as to cause the balls or shells to bo…
RIVETING n.
h covers the joint. -- Chain riveting, riveting in which the rivets, in two or more rows along the seam, are set one behind the other. -- Crossed riveting, riveting in which the rivets in one row are set opposite the spaces between the rivets in the next row. -- Double riveting, in lap riveting, two rows of rivets a…
ROLL v. 2 definitions
To move, as a curved object may, along a surface by rotation without sliding; to revolve upon an axis; to turn over and over; as, a ball or wheel rolls on the earth; a body rolls on an inclined plane. And her foot, look you, is fixed upon a spherical stone, which rolls, and rolls, and rolls. Shak.
SAND n.
ea, or orchestian. See Beach flea, under Beach. -- Sand flood, a vast body of sand borne along by the wind. James Bruce. -- Sand fluke. (Zoöl.) (a) The sandnecker. (b) The European smooth dab (Pleuronectes microcephalus); -- called also kitt, marysole, smear dab, town dab. -- Sand fly (Zoöl.), any one of several spe…
SARCINA n.
the stomach, associated with certain diseases. The individual organisms undergo division along two perpendicular partitions, so that multiplication takes place in two directions, giving groups of four cubical cells. Also used adjectively; as, a sarcina micrococcus; a sarcina group. Sarcina form (Biol.), the tetrad for…