A fast-running water-filled channel diverted from a river or stream used to drive a mill wheel.

A receive-only radar that uses ambient radio signals for search, tracking, surveillance, identification, guidance and mapping.

Someone who takes part in a race. / A racehorse. / A vehicle or other device used for, or designed specifically for, racing.

Racism presented as science or as supported by science.

mankind, humanity; humankind; Homo sapiens / Used other than figuratively or idiomatically: see human, race.

The application of radar to the study of the atmosphere, and to the observation and prediction of weather.

(astronomy) A technique that uses radar echoes to examine bodies within the solar system, obtaining information about size, shape, topography, surface density, spin etc.

(Britain, dated) Tribalism, nationalism. / The belief that humans can be categorized as belonging to distinct races, each race being characterized by fixed and heritable traits.

(vulgar, idiomatic) To urinate profusely, especially in reference to a profound need to do so.

Synonym of snowshoe hare