SPIRACLE
- breathing hole; opening by which a confined space has communication with the outer air; air hole
- a. aperture or orifice through which air or water passes in the act of respiration, as the blowhole of a cetacean b. opening in the head of sharks and rays through which water is drawn and passed over gills c. one of the external orif
- an orifice through which breathing occurs [n SPIRACLES]