Definition of root form in English:

root form


  • 1Linguistics. A word form consisting of an unmodified root, especially an uninflected verb form.

  • 2Zoology. A basal or ancestral form of an organism. Now rare.

  • 3Entomology. A wingless form occurring in some plant lice (especially of the family Phylloxeridae) feeding on roots.


Mid 19th century; earliest use found in Congregational Magazine. From root + form.


root form

/ˈruːt fɔːm/