[ en-duh-krin, -krahyn, -kreen ]
/ ˈɛn də krɪn, -ˌkraɪn, -ˌkrin /
Anatomy, Physiology

adjective Also en·do·cri·nal [en-duh-krahyn-l, -kreen-l] /ˌɛn dəˈkraɪn l, -ˈkrin l/, en·do·crin·ic [en-duh-krin-ik] /ˈɛn dəˈkrɪn ɪk/, endocrinous.

secreting internally into the blood or lymph.
of or relating to an endocrine gland or its secretion.


an internal secretion; hormone.

Nearby words

  1. endochondral ossification,
  2. endocolitis,
  3. endocranial,
  4. endocranial cast,
  5. endocranium,
  6. endocrine disruptor,
  7. endocrine gland,
  8. endocrine system,
  9. endocrinology,
  10. endocrinoma

Compare exocrine.

Origin of endocrine

1910–15; endo- + -crine < Greek krī́nein to separate

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for endocrines

  • Sulfa-tetradine deposits out in the endocrines, so a single dose is all a person can take.

    Mate in Two Moves|Winston Marks
  • Some day we shall have the proverb: 'A man is as old as his endocrines.'

    Black Oxen|Gertrude Franklin Horn Atherton

British Dictionary definitions for endocrines


/ (ˈɛndəʊˌkraɪn, -krɪn) /

adjective Also: endocrinal (ˌɛndəʊˈkraɪnəl), endocrinic (ˌɛndəʊˈkrɪnɪk), endocrinous (ɛnˈdɒkrɪnəs)

of or denoting endocrine glands or their secretionsendocrine disorders


an endocrine gland
Compare exocrine

Word Origin for endocrine

C20: from endo- + -crine, from Greek krinein to separate

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for endocrines



"secretly, internally," 1914, from endo- + Latinized form of Greek krinein "to separate, distinguish" (see crisis).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for endocrines


[ ĕndə-krĭn, -krēn′, -krīn′ ]


Secreting internally, most commonly into the systemic circulation.
Of or relating to endocrine glands or the hormones secreted by them.


The secretion of an endocrine gland.
An endocrine gland.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.