n. A process of bone formation in which ossification takes place in the perichondrium and either surrounds or gradually replaces the cartilage.
the GNU version of the Collaborative International Dictionary of English
n. A process of bone formation in which ossification takes place in the perichondrium and either surrounds or gradually replaces the cartilage.
The Century Dictionary and Cyclopedia
n. That form of ossification of cartilage which begins in or immediately under the perichondrium; also, growth of bone from without inward; periosteal ossification.