pneumatized

Flying birds are very light because of their pneumatized, hollow bones.

Archive 2006-01-01 2006

Flying birds are very light because of their pneumatized, hollow bones.

When Birds Attack.... 2006

The well-developed wings indicate a bird of lofty flight, yet of all the bones of the limbs, anterior as well as posterior, the humerus alone is pneumatized.

Scientific American Supplement, No. 829, November 21, 1891 Various