1. 内分泌的
The endocrine system is the system of glands that produce hormones which go directly into the bloodstream, such as the pituitary or thyroid glands.

1. any of the glands of the endocrine system that secrete hormones directly into the bloodstream

Synonym: endocrine glandductless gland

2. the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect

Synonym: hormoneinternal secretion