prothallus

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noun pro·thal·lus \(ˌ)prō-ˈtha-ləs\

Definition of prothallus

  1. 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. 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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