In front of the elbow.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for antecubital
Historical Examples of antecubital
Subcostal crossveins: in Odonata, are between subcosta and media on the basal side of the first antecubital.Explanation of Terms Used in Entomology
John. B. Smith