• Webster's Revised Unabridged Dictionary
    • n. pl Urodela (Zoöl) An order of amphibians having the tail well developed and often long. It comprises the salamanders, tritons, and allied animals.
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Century Dictionary and Cyclopedia
    • Urodela An order of Amphibia; the tailed amphibians; the ichthyomorphic amphibians, which retain the tail throughout life, as distinguished from the Anura, or tailless batrachians. They have a naked skin, and may or may not retain gills as well as tail, being thus either perennibranchiate or caducibranchiate. The salamanders, sirens, efts, newts, tritons, etc., are urodele. Equivalent names are Caudata, lchthyomorpha, Saurobatrachia. See cuts under axolotl, hell-bender, Menobranchus, newt, Proteus, salamander, Salamandra, and Spelerpes.
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Webster's Revised Unabridged Dictionary
NL.; Gr. tail + visible


In literature:

They need not be removed from the order, but, in this respect, recognized as more primitive than any other existing Urodela or Anura.
"The Ancestry of Modern Amphibia: A Review of the Evidence" by Theodore H. Eaton
Batrachia, which are divided into three orders: I Pseudophidia, II Urodela, III Anura.
"Natural History in Anecdote" by Various