onychograph

[ ŏnĭ-kō-grăf′, ō-nĭkə-grăf′, ŏ-nĭk- ]

n.

An instrument for recording the capillary blood pressure as shown by the circulation under a fingernail or toenail.

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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.