I. ˈen-də-krən, -ˌkrīn, -ˌkrēn adjective
Etymology: International Scientific Vocabulary end- + Greek krinein to separate — more at certain
Date: 1914
1. : secreting internally ; specifically : producing secretions that are distributed in the body by way of the bloodstream
hormones produced by the endocrine system
2. : of, relating to, affecting, or resembling an endocrine gland or secretion
endocrine tumors
II. noun
Date: 1922
1. : hormone 1
2. : endocrine gland