'Prothallus' definitions:
Definition of 'Prothallus'
- Prothallus \Pro*thal"lus\, n.; pl. Prothalli. [NL., fr. Gr. ?
before + ? a young shoot.] (Bot.)
The minute primary growth from the spore of ferns and other
Pteridophyta, which bears the true sexual organs; the
oophoric generation of ferns, etc.
[1913 Webster]
