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Synonyms

egg sac

American  

noun

  1. a silken case or capsule containing eggs of a female spider.

egg sac Scientific  

  1. The silken pouch in which many spiders deposit their eggs.

  2. Also called egg case

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The organism’s various states of evolution — as an egg sac or the Facehuggers that hatch from them — are back too.

From Los Angeles Times • Aug. 12, 2025

It can also spread when the spiderlings first hatch from the egg sac.

From Washington Post • Mar. 15, 2022

Like the praying mantis who's male through the whole thing, and then has this egg sac, but Mom and I still call it "he."

From Salon • Nov. 15, 2021

A striped fishing spider spinning an egg sac was among the winners in the Wildlife Photographer of the Year photo competition sponsored by the Natural History Museum in London.

From Science Magazine • Oct. 20, 2021

Up overhead, in the shadows of the ceiling, Charlotte crouched unseen, her front legs encircling her egg sac.

From "Charlotte's Web" by E.B. White

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.