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zona pellucida

American  
[zoh-nuh puh-loo-si-duh, pel-yoo-] / ˈzoʊ nə pəˈlu sɪ də, pɛlˈyu- /

noun

Anatomy.

plural

zonae pellucidae

  1. the transparent, noncellular layer surrounding the ovum of mammals, often having radial striations.

Etymology

Origin of zona pellucida

From New Latin, dating back to 1835–45; zone, pellucid

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.