Bible Dictionaries
Prothallus

Webster's Dictionary

(n.) The minute primary growth from the spore of ferns and other Pteridophyta, which bears the true sexual organs; the oophoric generation of ferns, etc.

Bibliography Information
Webster, Noah. Entry for 'Prothallus'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/prothallus.html. 1828.