[si-roh-suh, -zuh]
noun, plural serosas, serosae [si-roh-see, -zee] .
Embryology, Zoology.
the chorion.
a similar membrane in insects and other lower invertebrates.

1885–90; < Neo-Latin serōsa, feminine of serōsus, equivalent to Latin ser(um) serum + -ōsus -ose1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
serosa (sɪˈrəʊsə)
1.  another name for serous membrane
2.  one of the thin membranes surrounding the embryo in an insect's egg
[C19: from New Latin, from serōsus relating to serum]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

serosa se·ro·sa (sĭ-rō'sə, -zə)
n. pl. se·ro·sas or se·ro·sae (-sē, -zē)

  1. See serous membrane.

  2. The chorion of a bird or reptile embryo.

The American Heritage® Stedman's Medical Dictionary
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