gland
UK: ɡlænd | US: ɡlænd
n. An organ or specialized structure in the body that secretes substances (e.g., hormones, enzymes) for specific functions.
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The word "gland" originates from the Latin glandula, meaning "acorn" or "small gland," a diminutive of glans (acorn). This metaphorical usage reflects the shape resemblance of early anatomical observations (e.g., lymph nodes) to acorns. The term evolved in Middle French (glande) before entering English in the 17th century, retaining its biological focus on secretory organs.
The thyroid gland regulates metabolism.
Sweat glands help cool the body.
The doctor examined her swollen lymph glands.
Hormones are secreted directly into the bloodstream by endocrine glands.
Salivary glands produce enzymes to aid digestion.