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

From Freshwater Sponges, Hydroids & Polyzoa by Annandale, Nelson

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

From Freshwater Sponges, Hydroids & Polyzoa by Annandale, Nelson

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

From Freshwater Sponges, Hydroids & Polyzoa by Annandale, Nelson

Each mesentery is attached by its upper margin to the peristome, by its outer margin to the body-wall, and by its lower margin to the basal disk.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" by Various

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 Freshwater Sponges, Hydroids & Polyzoa by Annandale, Nelson