WHEEL n.
wheel, Fifth wheel, Overshot wheel, Spinning wheel, etc. See under Bevel, Brake, etc. -- Core wheel. (Mach.) (a) A mortise gear. (b) A wheel having a rim perforated to receive wooden cogs; the skeleton of a mortise gear. -- Measuring wheel, an odometer, or perambulator. -- Wheel and axle (Mech.), one of the elementa…
WOOD n.
lock (Naut.), a piece of wood close fitted and sheathed with copper, in the throating or score of the pintle, to keep the rudder from rising. -- Wood louse (Zoöl.) (a) Any one of numerous species of terrestrial isopod Crustacea belonging to Oniscus, Armadillo, and related genera. See Sow bug, under Sow, and Pill bug,…
YAM n.
A large, esculent, farinaceous tuber of various climbing plants of the genus Dioscorea; also, the plants themselves. Mostly natives of warm climates. The plants have netted-veined, petioled leaves, and pods with three broad wings. The commonest species is D. sativa, but several others are cultivated. Chinese yam, a pla…