a combining form meaning “angle,” used in the formation of compound words: goniometer.
Origin of gonio-
< Greek, combining form of gōnía
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Medicine definitions for gonio-
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.