noun (plural intermedia /-dēə/)Zoology
(In tetrapods) a carpal in the center of the wrist joint, or a tarsal in the center of the ankle joint.
- It is thickest at its presumed proximal end and is expanded medially to form an overlapping joint with the intermedium.
- They therefore identified the medial, proximal tarsal bone of Diadectes as the intermedium and equated it with the reptilian astragalus.
- The intermedium articulated only proximally and distally - that is, it did not articulate with other wrist bones.
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