a. Anat. [f. Gr. ἐπακτός (see prec.) + -AL.] ‘Imported; foreign’ (Syd. Soc. Lex.). Epactal bone: the Wormian bone at the superior angle of the occipital bone.
1878. Bartley, trans. Topinard’s Anthrop., II. i. 207. The exceptionally large ossa Wormiana … an epactal, for example.
