en·do·crine 
(ĕndə-krĭn, -krēn′)
(ĕndə-krĭn, -krēn′)adj.
1. Secreting internally.
2. Of or relating to endocrine glands or the hormones secreted by them.
n.
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.]