(biology) Having a similar evolutionary origin; homologous. / (mathematics) Having to do with homology. / (grammar) Of an adjective, describing itself.

(Canada, US) A small cylindrical piece of grated potato, generally deep-fried.

(organic chemistry) The removal of a carbamoyl group from a compound

A movement backwards or opposite to the intended or normal motion. / (astrology) The apparent movement of a planet across the sky in the opposite direction from its ordinary movement.