octogénaire, n.m.f. and adj., octogenary, octogenarian.
octogone, n.m. and adj., octagon; octagonal.
octostyle, adj., octostyle.
octroi, n.m., grant; concession; town-dues, toll, duty; octroi, toll-house or office.
octroyer, v.a., to grant, to concede.
octuple, adj., eightfold, octuple.
octupler, v.a., (l.u.) to increase eightfold.
oculaire, adj., ocular. Témoin —; eye-witness. Verre —; eye-glass.
oculaire, n.m., (opt.) eye-glass, eye-piece, eye-end.
oculairement (-lèr-mān), adv., ocularly.