basal disk

American  

noun

Anatomy.

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

---

Example Sentences

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

The basal disk is liberated and the tentacles contract, dragging the column, which still lies prone, along as they do so.

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

The basal disk is then turned round and fixed to the new support.

From Project Gutenberg