1. Secreting internally.
2. Of or relating to endocrine glands or the hormones secreted by them.

1. The secretion of an endocrine gland; a hormone.
2. An endocrine gland.

[French : Greek endo-, endo- + Greek krīnein, to separate.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.