a. Phys. [f. mod.L. amȳelencephalia absence of the brain and spinal cord. (f. Gr. ἀμύελ-ος without marrow + ἐγκέφαλ-ος brain) + -IC.] Having the central nervous system wanting.

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1875.  T. Hayden, Dis. Heart, 59. Examples of amyelencephalic fœtuses in which the heart contintued to pulsate.

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