Theelin
noun ·Rare ·Advanced level
Definitions
- 1 The steroid hormone estrone. uncountable
"The isolation of the crystalline hormone seems to justify the selection of a new name which should be reserved for the crystalline material and which in reality becomes the name of a new and probably hitherto unknown chemical substance. Accordingly, we suggest the term “theelin.“ This word is derived from the Greek word “theelus” used both adjectively and nominally to signify “female.”"
- 2 a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency wordnet
Example
More examples"The isolation of the crystalline hormone seems to justify the selection of a new name which should be reserved for the crystalline material and which in reality becomes the name of a new and probably hitherto unknown chemical substance. Accordingly, we suggest the term “theelin.“ This word is derived from the Greek word “theelus” used both adjectively and nominally to signify “female.”"
Etymology
The Greek word θῆλυς + suffix (“in”).
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.