An·ti·cli·nal a.
1. Inclining or dipping in opposite directions. See Synclinal.
Anticlinal line, Anticlinal axis Geol., a line from which strata dip in opposite directions, as from the ridge of a roof.
Anticlinal vertebra Anat., one of the dorsal vertebræ, which in many animals has an upright spine toward which the spines of the neighboring vertebræ are inclined.