scleroskeleton

from The Century Dictionary.

• noun Those hard or skeletal parts, collectively considered, which result from the ossification of tendons, ligaments, and similar sclerous tissues, as sesamoid bones developed in tendons, ossified tendons, as those of a turkey's leg, the marsupial bones of marsupials, the ring of bonelets in the eyeball, etc.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Anat.) That part of the skeleton which is developed in tendons, ligaments, and aponeuroses.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun anatomy, rare That part of the skeleton which is developed in tendons, ligaments, and aponeuroses.