zona pellucida

noun
zo·​na pel·​lu·​ci·​da | \ˌzō-nə-pə-ˈlü-sə-də, -pel-ˈyü-\
plural zonae pellucidae\ˌzō-​(ˌ)nē-​pə-​ˈlü-​sə-​(ˌ)dē, ˌzō-​ˌnī-​pə-​ˈlü-​sə-​ˌdī, -​pel-​ˈyü-​ \

Definition of zona pellucida 

: the transparent more or less elastic noncellular outer layer or envelope of a mammalian ovum that is composed of glycoproteins

First Known Use of zona pellucida

1841, in the meaning defined above

History and Etymology for zona pellucida

New Latin, transparent zone

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The first known use of zona pellucida was in 1841

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zona pellucida

noun
zona pel·​lu·​ci·​da | \-pə-ˈlü-sə-də \

Medical Definition of zona pellucida 

: the transparent more or less elastic noncellular glycoprotein outer layer or envelope of a mammalian ovum often traversed by numerous radiating striae

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