dermal bone


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

dermal bone

[¦dər·məl ′bōn]
(anatomy)
A type of bone that ossifies directly from membrane without a cartilaginous predecessor; occurs only in the skull and shoulder region. Also known as investing bone; membrane bone.
References in periodicals archive ?
The pelvic girdle was firmly attached to the vertebral column, and the pectoral girdle had smaller extrascapular dermal bone components (with the exception of the clavicle, which was larger).
At this point in the evolutionary process, the palatoquadrate was completely fused with the chondrocranium to form a true autostylic jaw suspension, and it was covered almost entirely by dermal bone.
What we call the skull in humans was formed from a combination of the primitive brain case (chondrocranium), the sensory capsules and their underlying supports, components of the visceral skeleton (gill arches and their derivatives), and the overlying dermal bones (dermatocranium).