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exothecium
exothecium n. 
/ˌɛksoʊˈθisiəm/ Botany ‘the cuticular or outer layer of the anther’ ( New Sydenham Soc. Lexicon). [After scientific Latin exothecium (1830 or earlier).]
Brit. /ˌɛksə(ʊ)ˈθiːsɪəm/
, /ˌɛksə(ʊ)ˈθiːsɪəm/U.S. /ˌɛksəˈθisiəm/
, /ˌɛksəˈθisiəm//ˌɛksoʊˈθisiəm/ΚΠ
1861 R. Bentley Man. Bot. i. iv. 247 An outer..which..is called the exothecium.
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