planaria Meaning, Definition & Usage

  1. noun free-swimming mostly freshwater flatworms; popular in laboratory studies for the ability to regenerate lost parts
    planarian.

WordNet

Pla*na"ri*a noun
Etymology
NL. See Planary.
Wordforms
plural L Planariæ E -rias
Definitions
  1. (Zoöl.) 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.

Webster 1913