<p><strong>Noun</strong></p><ul><li>any protozoan of the phylum Ciliophora, as those of the genera Paramecium, Tetrahymena, Stentor, and Vorticella, having cilia on part or all of the surface.</li></ul><p><strong>Adjective</strong></p><ul><li>having cilia</li><li>belonging or pertaining to the phylum Ciliophora</li></ul>