What is another word for egg sac?
Pronunciation: [ˈɛɡ sˈak] (IPA) 
The term "egg sac" is used to describe a protective container that holds eggs produced by female animals such as spiders, insects, and fish until they hatch. There are various synonyms for this term, depending on the type of animal that lays the eggs. For instance, in arthropods and spiders, the term "ootheca" is used while in fish, it is known as "roe" or "spawning". Insects such as moths and butterflies use the term "chrysalis" to describe the egg sac. Other synonyms for egg sac include "spawn sack", "caviar", "ovisac", "nidamental gland", and "ooecium". These synonyms help to convey the same meaning as egg sac in a particular context.
