basal disk

American  

noun

Anatomy.

1. the flattened basal surface by which coelenterate polyps attach to the substrate.

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Example Sentences

The typical form, which was described in 1869 by Stoliczka from specimens taken in tidal creeks and estuaries in the Gangetic area and in the ponds at Port Canning, is found attached to solid objects by its basal disk.

From Project Gutenberg

The basal disk is even narrower and is not splayed out round the edges.

From Project Gutenberg

The basal disk is then detached and the column is twisted round until the basal disk again comes in contact with the surface at a point some distance in advance of its previous point of attachment.

From Project Gutenberg

The column is dragged forward, still lying almost prone, the basal disk is bent downwards and again attached, and the whole movement is repeated.

From Project Gutenberg

It commences by a constriction of the column which finally separates the animal into two parts, the lower of which develops tentacles and a mouth, while the upper part develops a basal disk.

From Project Gutenberg