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Definition of: prothallium

(prō·thalē·əm) noun plural ·li·a (-ē·ə) Bot.
The first or false thallus formed on the germination of the asexually produced spores in pteridophytes; a delicate, evanescent cellular structure bearing the sexual organs. Also pro·thal′lus. [<NL <Gk. pro- before + thallion, dim. of thallos a shoot]
—pro·thal′li·al
adjective
—pro·thal′line
(-thalīn, -in) adjective

Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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