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planar
-- Planaria --
Planarian
Planarida
Planarioid
Planary
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planation
Planch
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Planck's constant
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Plane
Planaria
Pla`na´ri`a
| n. | 1. | (Zool.) 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. |
| Noun | 1. |  planaria - free-swimming mostly freshwater flatworms; popular in laboratory studies for the ability to regenerate lost partsSynonyms: planarian |