Deeply pitted, like a honeycomb.

Like a honeycomb; closely pitted.

a. (L. alveolatus, pitted) deeply pitted so as to resemble a honeycomb, as are the surfaces of some seeds or achenes.

(adj.) ( Van Campo, 1971) Describing a type of sexine/ ectexine structure, in which the infratectal layer is characterised by partitions forming compartments of irregular size and shape. Example: Pinus (Pinaceae). See also: columella, granular exine.

The alveolates are a major line of protists.