noun
1.
a. : one of the posterior plates of the plastron of a turtle
b. : the large scale in front of the anus of most snakes
2. : the fused plate of early embryonic ectoderm and endoderm through which the anus later ruptures
noun
1.
a. : one of the posterior plates of the plastron of a turtle
b. : the large scale in front of the anus of most snakes
2. : the fused plate of early embryonic ectoderm and endoderm through which the anus later ruptures
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012