Pronunciation: (ki-nē'sis, kī-), [key]
the movement of an organism in response to a stimulus, as light.
a combining form with the general sense “movement, activity,” used in the formation of compound words, often with the particular senses “reaction to a stimulus” (photokinesis), “movement without an apparent physical cause” (telekinesis), “activity within a cell” (karyokinesis). Cf. -kinesia.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.