a combining form meaning “gills,” used in the formation of compound words: branchiopod.
- branchial groove,
- branchial pouch,
- branchiomotor nuclei,
Also especially before a vowel, branchi-.
Origin of branchio-
combining form representing Greek bránchia branchia
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019