| planaria | Origin: NL. See Planary. <zoology> Any species of turbellarian worms belonging to Planaria, and many allied genera. The body is usually flat, thin, and smooth. Some species, in warm countries, are terrestrial. Source: Websters Dictionary (01 Mar 1998) |
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| planarian | <zoology> One of the Planarida, or Dendrocoela; any turbellarian worm. Plana"rian. Source: Websters Dictionary (01 Mar 1998) |
| planarians | Nonparasitic free-living flatworms of the class turbellaria. The most common genera are dugesia, formerly planaria, which lives in water, and bipalium, which lives on land. Geoplana occurs in south america and california. (12 Dec 1998) |