pseudostome
Collocations
2ADJ.
deep
VERB + PSEUDOSTOME
shrink
Definitions
noun
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.
The sarcodic body of the pseudembryo begins to shrink, the pseudostome and the two lower bauds of cilia disappear, and afterwards the two upper bands, and the embryo then becomes fixed to a stone, seaweed, or some other object.
A false osculum or secondary opening which replaces the original osculum of a sponge.
A false opening that resembles a stoma but without any true aperture.
The opening is via a pseudostome situated on the chamber or at the top of a neck which flares out to form a collar.
It is flattened ventrally and is smooth around the pseudostome area.
A North American rodent, Geomys bursarius.
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Idioms & Phrases
Example Bank
3In 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 pseudembr
WiktionaryThe sarcodic body of the pseudembryo begins to shrink, the pseudostome and the two lower bauds of cilia disappear, and afterwards the two upper bands, and the embryo then becomes fixed to a stone, sea
WiktionaryOn one side of the body it has formed an arch forwards, its apex nearly touching the second band; and in the wider space thus left between the third band and the fourth, the pseudostome forms a deep i
Wiktionary