Also called lamellibranch. Zoology. any mollusk, as the oyster, clam, scallop, or mussel, of the class Bivalvia, having two shells hinged together, a soft body, and lamellate gills. Botany. having two valves, as a seedcase. Zoology. having two shells, usually united by a hinge. having two similar parts hinged together. Historical Examples Encyclopaedia Britannica, 11th […]
a sensitive vane that measures both the horizontal and vertical components of wind direction.
of, relating to, or having two variates. adjective (statistics) (of a distribution) involving two random variables, not necessarily independent of one another adj.