Dictionary
chon•dro•cra•ni•um
Pronunciation: (kon"drō-krā'nē-um) [key]—
n.,
—pl. -ni•ums, -ni•aPronunciation: (-nē-u). [key]
a braincase composed of cartilage rather than bone, as the skull of sharks and of the vertebrate embryo before ossification.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.