A genus of parasitic protozoan flagellates, formerly part of the genus Trichomonas but now separated into a distinct genus by the presence of four anterior and one trailing flagella, a pelta, and a disc-shaped parabasal body. See Trichomonas. [tetra- + Trichomonas]
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Tet·ra·tricho·mo·nas (tet″rə-trik″o-moґnəs) a genus of protozoa of the order Trichomonadida, phylum Parabasalia, including certain species with four anterior flagella that were formerly included in Trichomonas.Medical dictionary. 2011.