(anthropology) A distinctive human type possessing characteristic traits that are transmissible by descent. Descendants of a common ancestor.
(biology) An infraspecific taxonomic group of organisms, such as subspecies or microspecies. A fixed variety or breed.
(design engineering) Either of the concentric pair of steel rings of a ball bearing or roller bearing.
(engineering) A channel transporting water to or away from hydraulic machinery, as in a power house.
(oceanography) A rapid current, or a constricted channel in which such a current flows; the term is usually used only in connection with a tidal current, which may be called a tide race.


