Meaning & use
hormone
A chemical substance produced by a gland that travels through the blood to regulate specific organs or tissues.
See it in a sentence
Insulin is a hormone that helps the body control blood sugar levels.
Doctors measured her thyroid hormone levels to explain the sudden weight loss.
A note on using this word
Hormone is often used loosely in everyday speech for any substance thought to affect mood or growth, as during puberty.
Words with a similar meaning
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