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Dictionary

pro•thal•li•um

Pronunciation: (prō-thal'ē-um), [key]
—n.,
—pl. -thal•li•aPronunciation: (-thal'ē-u). [key]
1. Bot.the gametophyte of ferns and related plants.
2. the analogous rudimentary gametophyte of seed-bearing plants.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

prothalamium

prothallus

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