| internal secretion | |
| —n | |
| physiol a secretion, esp a hormone, that is absorbed directly into the blood | |
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| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a chattering or flighty, light-headed person. |
internal secretion n.
A secretion that is produced by an endocrine gland and discharged directly into the bloodstream; a hormone.