athalamous

\(ˈ)āˈthaləməs\ adjective

Etymology: a- (II) + Latin thalamus marriage bed, bedroom (from Greek thalamos bedroom, room) + English -ous; akin to Greek tholos rotunda — more at dale

1. : lacking a torus or receptacle

athalamous flowers

2. : without apothecia, beds, or shields for spores

athalamous lichens

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athalamous, a. Bot.

(əˈθæləməs)

[f. Gr. ἀ priv. + θάλαµ-ος bed + -ous.]

Of lichens: Having no conceptacles or spore-shields on the thallus.

in Craig.