Trachystomata
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Tra`chy`stom´a`ta
| n. pl. | 1. | (Zool.) An order of tailed aquatic amphibians, including Siren and Pseudobranchus. They have anterior legs only, are eel-like in form, and have no teeth except a small patch on the palate. The external gills are persistent through life. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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