Biol. Any vessel shaped like the ancient ampulla; the dilated end of any vessel, canal, or duct in an animal; the spongiole of a root in plants.
= spongiole, n. 1.
Botany. The tender extremity of the radicle of a plant, characterized by loose sponge-like cellular tissue; a spongelet.
Botany. = spongiole, n. 1.
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