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Webster 1913 Edition

Adj.

[Gr.

ἀ

priv. + [GREEK] nuptial bed.]

(Bot.)

Not furnished with shields or beds for the spores, as the thallus of certain lichens.

athalamous ‎(not comparable)

(botany, rare) Not furnished with shields or beds for the spores, like the thallus of certain lichens.