The Collaborative International Dictionary
Prothallia
Prothallium \Pro*thal"li*um\, n.; pl. Prothallia. [NL.] (Bot.) Same as Prothallus.
Wiktionary
prothallia
n. (plural of prothallium English)
WordNet
prothallia
See prothallium
Usage examples of "prothallia".
The beings multiplied by means of spores - like vegetable pteridophytes, as Lake had suspected - but, owing to their prodigious toughness and longevity, and consequent lack of replacement needs, they did not encourage the large-scale development of new prothallia except when they had new regions to colonize.