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prothallus

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noun pro·thal·lus \(ˌ)prō-ˈtha-ləs\

Definition of prothallus

  1. 1 :  the gametophyte of a pteridophyte (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 of prothallus

New Latin


First Known Use: 1854

Rhymes with prothallus


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a division or portion of a pool or whole

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