: the peripheral opaque area that surrounds the area pellucida of a vertebrate embryo (as of a bird) formed by discoidal cleavage
Dictionary Entries Near area opaca
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“Area opaca.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/area%20opaca. Accessed 18 Apr. 2024.
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