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American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||theelin - a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency|
estrogen, oestrogen - a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics
ketosteroid - a steroid containing a ketone group
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