| Answer | Crossword Clue |
|---|---|
| spiracle | an orifice through which breathing occurs |
| spiracles | SPIRACLE, an orifice through which breathing occurs |
| spiracle | 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 |
