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prothalli |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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 o["o]phoric generation of ferns, etc
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