Dictionary![]() ![]() tet•ra•hy•me•naPronunciation: (te"tru-hī'mu-nu), [key] —n. Biol. any ciliated protozoan of the genus Tetrahymena, a relative of the paramecium: often used in genetics research. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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