I learned that in addition to the regular confusing biological axes of superior-inferior, anterior-posterior, rostral-caudal, ventral-dorsal, proximal-distal, oral-aboral, apical-basal, adaxial-abaxial(fuck this one) and medial-lateral, there's also introrse and extrorse, pertaining specifically to facing towards a central axis and away from a central axis (mostly about the directions of dehiscence of anthers in a flower it seems).
edit: peripheral-central is another one