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protonema

play
noun pro·to·ne·ma \ˌprō-tə-ˈnē-mə\

Definition of protonema

plural pro·to·ne·ma·taplay \-ˈnē-mə-tə, -ˈne-\

  1. :  the primary usually filamentous thalloid stage of the gametophyte in mosses and in some liverworts comparable to the prothallus in ferns

pro·to·ne·mal play \-ˈnē-məl\ adjective
pro·to·ne·ma·tal play \-ˈnē-mə-təl, -ˈne-\ adjective


Origin of protonema

New Latin protonemat-, protonema, from prot- + Greek nēma thread — more at nemat-


First Known Use: 1857


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