Lab`y*rin"tho*don\, n. [Gr. laby`rinqos labyrinth + 'odoy`s, 'odo`ntos, tooth.] (Paleon.) A genus of very large fossil amphibians, of the Triassic period, having bony plates on the under side of the body. It is the type of the order Labyrinthodonta. Called also {Mastodonsaurus}.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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