principal axis Definition

optic axis, backbone, latus rectum, point, points, apsis, directive, length, rhachis, scenography, gorgoniacea, neurite, beam, branch, center, collimator, core, focus, offset, radius, reverse, shaft, side, spheroid, stem, stemmed, stemming, trunk, trunking, trunks, vertex, wheel, hemal, interrupted, line, turn, turned, brain, brains, director, foot, right, gnomon, nazi, admixture, agency, anchor, aorta, artery, base, basic, basis, bau, bay, baying, body, bond, burden, cadence, cadenced, cadences, capital, carotid, cathedral, central, chitin, chord, cleat, client, come, commodore, conventional, counter, degree, department, desert, digress, dimension, dimensionality, dimensionally, dimensioning, domebook, dots, down, doy, dpt, east, elegiac, elements, essential, exposition, extension, face, fibroin, first, flagship, focal, fountainhead, from, frome,