Geography . on the opposite side of the globe; pertaining to the antipodes.

diametrically opposite

twin brothers with antipodal personalities.

Botany . (in a developing ovule) of or at the end opposite to the micropyle

antipodal nuclei.

adjective

antipodean , antithetical , antonymic , antonymous , contradictory , contrary , converse , counter , diametric , diametrical , opposing , polar , reverse , opposed , opposite