quadrate

(kwŏdˈrātˌ, -rĭt)

1. a. A square or cube.
   b. An approximately square or cubic area, space, or object.
2. Zoology A bone or cartilaginous structure of the skull, joining the upper and lower jaws in birds, fish, reptiles, and amphibians.

1. Having four sides and four angles; square or rectangular.
2. Zoology Of or being the quadrate bone or cartilage.