ROTARY a.
by rotating devices which take the place of reciprocating buckets or pistons. -- Rotary shears, shears, as for cloth, metal, etc., in which revolving sharp-edged or sharp-cornered wheels do the cutting. -- Rotary valve, a valve acting by continuous or partial rotation, as in the four-way cock.
SCISSORS n.
A cutting instrument resembling shears, but smaller, consisting of two cutting blades with handles, movable on a pin in the center, by which they are held together. Often called a pair of scissors. [Formerly written also cisors, cizars, and scissars.] Scissors grinder (Zoöl.), the European goatsucker. [Prov. Eng.]…
SHEER n.
Shears See Shear. Sheer batten (Shipbuilding), a long strip of wood to guide the carpenters in following the sheer plan. -- Sheer boom, a boom slanting across a stream to direct floating logs to one side. -- Sheer hulk. See Shear hulk, under Hulk. -- Sheer plan, or Sheer draught (Shipbuilding), a projection of the l…