from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A certain ventral bone of reptiles.
from The Century Dictionary and Cyclopedia
- Pertaining to the external pterygoid bone or muscle.
- n. An external pterygoid bone; one of the lateral bones of the palate of some animals, as reptiles. It is highly developed, for instance, in the crocodile. See Crocodilia.
- n. In typical fishes, the external of two bones just behind the palatine, generally called pterygoid. See cut under palato-quadrate.
- n. In anatomy, the ectopterygoid muscle.
ecto- + pterygoid (Wiktionary)
A long ectopterygoid serves as a lever-type mechanism to raise and lower the fang.