ˌrādēˈa(ˌ)lē, -ˈā(-, -ˈä(- noun
( plural radi·alia -_lēə)
Etymology: New Latin, from Medieval Latin, neuter singular of radialis radial
1.
a. : a bone or cartilage of the carpus that articulates with the radius ; specifically : the navicular in man
b. : a bone in the carpus of a bird made up of the radiale fused with either the intermedium or the centrale
2. : a radial plate of a crinoid
3. : a bone or cartilage distal to the basale and directly supporting a ray in a fish's fin ; also : actinost