1. Within, or between the layers of, a membrane. 2. Denoting a method of bone formation directly from mesenchymal cells without an intervening cartilage stage (occurring, for example, in the calvaria), as distinguished from intracartilaginous bone formation.
* * *
in·tra·mem·bra·nous -'mem-brə-nəs adj
1) relating to, formed by, or being ossification of a membrane <\intramembranous bone development> compare ENDOCHONDRAL, PERICHONDRAL
2) situated within a membrane <\intramembranous proteins>
* * *
in·tra·mem·bra·nous (in″trə-memґbrə-nəs) within a membrane.Medical dictionary. 2011.