onychograph

[ŏn′ĭ-kō-grăf′, ō-nĭk′ə-grăf′, ŏ-nĭk′-]

n.

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

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