ossiferous (os-sif'er-us)

Containing or yielding to bear.] bone. [Lat., os, a bone, -fferre, o ification (os-sif-ik-a's hun). 1. The formation of bone. See osteogenesis. 2. Change into a bony substance. accidental o. A term incorrectly applied to calcareous degeneration, inter membranous o. See intra membranous o. intra cartilaginous o. O. from temporary cartilage, the cartilage becoming at first partly calcified and then absorbed by osteoclasts as the formation of the true bone proceeds from the investing periosteum. intra membranous o. i. The development of bone in connective ti ue, without any intermediate formation of cartilage, by the outward growth from the center of o. of osteogenic fibers around and upon which are arranged the osteoblasts which deposit the bone. 2. O. within a membranous sac. o. of permanent cartilage. The formation of osteoblasts in permanent hyaline cartilage; it must not be confounded with calcareous or uratic deposits in the cartilage, periosteal o. O. in the osteogenetic layer of the periosteum. See osteogenesis. senile o. A term incorrectly applied to vascular and interstitial calcareous degeneration occurring in old persons. sub periosteal o. The projection of osteoblasts from bone into the layer of round or polygonal cells beneath the periosteum. [Lat., o iUcatio, from os, a bone, + facer e, to make.]