Adjective
Situated between bones; as, an interosseous ligament.
Source: Webster's dictionaryPlatzer 2004, p 262 In the deep layer of posterior muscles tibialis posterior arises proximally on the back of the interosseous membrane and adjoining bones and divides into two parts in the sole of the foot to attach to the tarsus. Source: Internet
The tibia and fibula and the interosseous membrane separate these muscles into anterior and posterior groups, in their turn subdivided into subgroups and layers. Source: Internet