eccrine gland

n.
  1. Any of the numerous small sweat glands distributed over the body's surface that produce a clear aqueous secretion devoid of cytoplasmic constituents and important in regulating body temperature.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.