Rha″chi‐o‐dont (?), a. [Gr. ρἅχισ, -ιοσ, the spine + ���, ���, a tooth.] (Zoöl.) Having gular teeth formed by a peculiar modification of the inferior spines of some of the vertebræ, as certain South African snakes (Dasypeltis) which swallow birds' eggs and use these gular teeth to crush them.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.