opalin, -e, adj., opaline.
s’opaliser, v.r., to opalize, to become opalized.
opaque, adj., opaque.
opéra, n.m., opera, opera-house. C’est un vrai —; it is a perfect imbroglio.
opérant, -e, adj., operating.
opérat-eur, n.m., -rice, n.f., operator; mountebank, quack.
opérati-f, -ve, operative.
opération, n.f., operation, working, performance; (fin.) transaction. Subir une —; to undergo an operation. Terminer une —; to close a transaction.
opératoire, adj., operative. Médecine —; surgery.
operculaire, adj., (bot.) operculate, operculated.