prothallus

noun pro·thal·lus \ (ˌ)prō-ˈtha-ləs \

Definition of prothallus

1 : the gametophyte of a pteridophyte (such as a fern) that is typically a small flat green thallus attached to the soil by rhizoids
2 : a greatly reduced structure of a seed plant corresponding to the pteridophyte prothallus

Illustration of prothallus

Origin and Etymology of prothallus

New Latin


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