Definition of breathing valve
: one of certain folds of membrane that control the direction of the flow of water through the mouth, past the gills, and to the exterior in many fishes
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
Ask the Editors
- Why is there a 'd' in 'fridge' but not in 'refrigerator'?
- 'All Intensive Purposes' or 'All Intents and Purposes'?
- Is Singular 'They' a Better Choice?