eccrine gland

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a small sweat gland that produces only a fluid; restricted to the human skin