en·do·crine (ĕndə-krĭn, -krēn′)
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; see krei- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.