enamel rod inclination

e·nam·el rod in·cli·na·tion

the direction of the enamel rods with reference to the outer surface of the enamel of a tooth.

e·nam·el rod in·clin·a·tion

(ĕ-namĕl rod inkli-nāshŭn)
Direction of the enamel rods with reference to outer surface tooth enamel.