RECIPROCATE v.
To move forward and backward alternately; to recur in vicissitude; to act interchangeably; to alternate. One brawny smith the puffing bellows plies, And draws and blows reciprocating air. Dryden. Reciprocating engine, a steam, air, or gas engine, etc., in which the piston moves back and forth; -- in distinction from a…
SHIN v.
To climb a mast, tree, rope, or the like, by embracing it alternately with the arms and legs, without help of steps, spurs, or the like; -- used with up; as, to shin up a mast. [Slang]
SINKER n.
dles. Dividing sinker, in knitting machines, a sinker between two jack sinkers and acting alternately with them. -- Jack sinker. See under Jack, n. -- Sinker bar. (a) In knitting machines, a bar to which one set of the sinkers is attached. (b) In deep well boring, a heavy bar forming a connection between the lifting…
SLIDE n.
ng valve, often used in steam engines for admitting steam to the piston and releasing it, alternately, having a cuplike cavity in its face, through which the exhaust steam passes. It is situated in the steam chest, and moved by the valve gear. It is sometimes called a D valve, -- a name which is also applied to a semic…
SPOROPHORE n.
That alternately produced form of certain cryptogamous plants, as ferns, mosses, and the like, which is nonsexual, but produces spores in countless numbers. In ferns it is the leafy plant, in mosses the capsule. Cf. Oöphore.