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zona pellucida

[zoh-nuh puh-loo-si-duh, pel-yoo-] /ˈzoʊ nə pəˈlu sɪ də, pɛlˈyu-/
noun, plural zonae pellucidae
[zoh-nee puh-loo-si-dee, pel-yoo-] /ˈzoʊ ni pəˈlu sɪˌdi, pɛlˈyu-/ (Show IPA).
the transparent, noncellular layer surrounding the ovum of mammals, often having radial striations.
Origin of zona pellucida
From New Latin, dating back to 1835-45; See origin at zone, pellucid Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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zona pellucida in Medicine

zona pellucida zona pel·lu·ci·da (pə-lōō'sĭ-də, pěl-yōō'-)
The thick solid transparent outer membrane of a developed mammalian ovum. Also called oolemma.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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