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A division of Amphibia including the Salamanders and allied groups; the Urodela.

A tribe of lizards including the skinks. See Skink.

Same as Scorpiones.

Same as Silicoidea.

An extensive order of Porifera, which includes those that have the skeleton composed mainly of siliceous fibers or spicules.

Same as Gephyrea.

Same as Solifugæ.

An order of irregular sea urchins, usually having a more or less heart-shaped shell with four or five petal-like ambulacra above. The mouth is edentulous and situated anteriorly, on the under side.

A starfish, or brittle star.

Same as Struthiones.

Situated or performed beneath the hyoid bone; as, subhyoidean laryngotomy.

The division of cestode worms which comprises the tapeworms. See Tapeworm.

Having the posterior tarsal scales, or scutella, rectangular and arranged in regular rows; -- said of certain birds.

Thyroid.

A division of chelonians which comprises Trionyx and allied genera; -- called also Trionychoides, and Trionychina.

Having no ideas; senseless; frivolous. "Unideaed girls." Mrs. Hemans. He [Bacon] received the unideaed page [Villiers] into his intimacy. Lord Campbell.

Not ideal; real; unimaginative.

A division of serpents which includes the true vipers of the Old World and the rattlesnakes and moccasin snakes of America; -- called also Viperina.

rated from matter; exiting in the mind only; as, abstract truth, abstract numbers. Hence: ideal; abstruse; difficult.

Separated from matter; abstract; ideal. [Obs.]