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  • English Word Opisthobranchia Definition Alt. of Opisthobranchiata
  • English Word Opisthobranchiata Definition A division of gastropod Mollusca, in which the breathing organs are usually situated behind the heart. It includes the tectibranchs and nudibranchs.
  • English Word Opisthobranchiate Definition Of or pertaining to the Opisthobranchiata.
  • English Word Opisthobranchiate Definition One of the Opisthobranchiata.
  • English Word Opisthocoelian Definition Alt. of Opisthocoelous
  • English Word Opisthocoelous Definition Concave behind; -- applied especially to vertebrae in which the anterior end of the centrum is convex and the posterior concave.
  • English Word Opisthodome Definition A back chamber; especially, that part of the naos, or cella, farthest from the main entrance, sometimes having an entrance of its own, and often used as a treasury.
  • English Word Opisthoglypha Definition A division of serpents which have some of the posterior maxillary teeth grooved for fangs.
  • English Word Opisthography Definition A writing upon the back of anything, as upon the back of a leaf or sheet already written upon on one side.
  • English Word Opisthomi Definition An order of eellike fishes having the scapular arch attached to the vertebrae, but not connected with the skull.
  • English Word Opisthopulmonate Definition Having the pulmonary sac situated posteriorly; -- said of certain air-breathing Mollusca.
  • English Word Opisthotic Definition The inferior and posterior of the three elements forming the periotic bone.
  • English Word Opisthotonos Definition A tetanic spasm in which the body is bent backwards and stiffened.
  • English Word Opitulation Definition The act of helping or aiding; help.
  • English Word Opium Definition The inspissated juice of the Papaver somniferum, or white poppy.
  • English Word Ople tree Definition The witch-hazel.
  • English Word Opobalsam Definition Alt. of Opobalsamum
  • English Word Opobalsamum Definition The old name of the aromatic resinous juice of the Balsamodendron opobalsamum, now commonly called balm of Gilead. See under Balm.
  • English Word Opodeldoc Definition A kind of plaster, said to have been invented by Mindererus, -- used for external injuries.
  • English Word Opodeldoc Definition A saponaceous, camphorated liniment; a solution of soap in alcohol, with the addition of camphor and essential oils; soap liniment.
  • English Word Opopanax Definition The inspissated juice of an umbelliferous plant (the Opoponax Chironum), brought from Turkey and the East Indies in loose granules, or sometimes in larger masses, of a reddish yellow color, with specks of white. It has a strong smell and acrid taste, and was formerly used in medicine as an emmenagogue and antispasmodic.
  • English Word Opossum Definition Any American marsupial of the genera Didelphys and Chironectes. The common species of the United States is Didelphys Virginiana.
  • English Word Oppidan Definition Of or pertaining to a town.
  • English Word Oppidan Definition An inhabitant of a town.
  • English Word Oppidan Definition A student of Eton College, England, who is not a King's scholar, and who boards in a private family.
  • English Word Oppignerate Definition To pledge; to pawn.
  • English Word Oppilate Definition To crowd together; to fill with obstructions; to block up.
  • English Word Oppilated Definition of Oppilate
  • English Word Oppilating Definition of Oppilate
  • English Word Oppilation Definition The act of filling or crowding together; a stopping by redundant matter; obstruction, particularly in the lower intestines.