D defs.my
Entry 1 sense Webster, 1913

Prothallus

/prōthˌ-ăl'-əs/ · Pro·thal·lus · IPA /prˌoʊθˈæləs/
01 n. The minute primary growth from the spore of ferns and other Pteridophyta, which bears the true sexual organs; the oophoric generation of fe…
pl. Prothalli ((#))
  1. 1.
    The minute primary growth from the spore of ferns and other Pteridophyta, which bears the true sexual organs; the oophoric generation of ferns, etc.(Bot.)