Pseudostome
noun ·Rare ·Advanced level
Definitions
- 1 The oral opening on the pseudembryo of an echinoderm.
"In all the cases which I have observed, the ciliated bands so characteristic of the pseudembryonic form have made their appearance before the rupture of the vitelline sac; and frequently the pseudembryo has become somewhat reniform, a depressed ciliated patch indicating the position of the pseudostome."
- 2 A false osculum or secondary opening which replaces the original osculum of a sponge.
- 3 A false opening that resembles a stoma but without any true aperture. broadly
"The opening is via a pseudostome situated on the chamber or at the top of a neck which flares out to form a collar."
- 4 A North American rodent, Geomys bursarius.
Example
More examples"In all the cases which I have observed, the ciliated bands so characteristic of the pseudembryonic form have made their appearance before the rupture of the vitelline sac; and frequently the pseudembryo has become somewhat reniform, a depressed ciliated patch indicating the position of the pseudostome."
Etymology
From pseudo- + -stome.
Related phrases
More for "pseudostome"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.