endocrine gland

noun

1. any of various glands, as the thyroid, adrenal, and pituitary glands, that secrete certain substances or hormones directly into the blood or lymph; ductless gland.

noun

1. any of the glands that secrete hormones directly into the bloodstream, including the pituitary, pineal, thyroid, parathyroid, adrenal, testes, ovaries, and the pancreatic islets of LangerhansAlso called: ductless gland

n.

1. Any of various ductless glands, such as the thyroid, adrenal, or pituitary, having hormonal secretions that pass directly into the bloodstream.ductless gland

1. A gland of the body that produces hormones and secretes them directly into the bloodstream. In mammals, the thyroid gland, adrenal glands, and pituitary gland, as well as the ovaries, testes, and the islets of Langerhans of the pancreas are endocrine glands.