Calistheneum :: Calistheneum (n.) A gymnasium; esp. one for light physical exercise by women and children.
Calisthenics :: Calisthenics (n.) The science, art, or practice of healthful exercise of the body and limbs, to promote strength and gracefulness; light gymnastics..
Calisthenis :: Calisthenis (a.) Of or pertaining to calisthenics.
Isthmian :: Isthmian (a.) Of or pertaining to an isthmus, especially to the Isthmus of Corinth, in Greece..
Isthmus :: Isthmus (n.) A neck or narrow slip of land by which two continents are connected, or by which a peninsula is united to the mainland; as, the Isthmus of Panama; the Isthmus of Suez, etc..
Opisthobranchiata :: Opisthobranchiata (n. pl.) A division of gastropod Mollusca, in which the breathing organs are usually situated behind the heart. It includes the tectibranchs and nudibranchs..
Opisthobranchiate :: Opisthobranchiate (a.) Of or pertaining to the Opisthobranchiata.
Opisthocoelous :: Opisthocoelous (a.) Concave behind; -- applied especially to vertebrae in which the anterior end of the centrum is convex and the posterior concave.
Opisthodome :: Opisthodome (n.) 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..
Opisthoglypha :: Opisthoglypha (n. pl.) A division of serpents which have some of the posterior maxillary teeth grooved for fangs.
Opisthography :: Opisthography (n.) A writing upon the back of anything, as upon the back of a leaf or sheet already written upon on one side..
Opisthomi :: Opisthomi (n. pl.) An order of eellike fishes having the scapular arch attached to the vertebrae, but not connected with the skull..
Opisthopulmonate :: Opisthopulmonate (a.) Having the pulmonary sac situated posteriorly; -- said of certain air-breathing Mollusca.
Opisthotic :: Opisthotic (n.) The inferior and posterior of the three elements forming the periotic bone.
Opisthotonos :: Opisthotonos (n.) A tetanic spasm in which the body is bent backwards and stiffened.