Definitions

1. noun

A part of the brain in certain invertebrates, especially the worm-like body of the cerebral ganglia of a snail or slug.

“The biologist studied the vermis of a snail to understand its nervous system.”

2. noun

In anatomy, the worm-like or thread-like part of a structure, especially the cerebellum.

“The doctor examined the patient’s vermis to check for any neurological disorders.”