plural sacs
: a part inside the body of an animal or plant that is shaped like a bag and that usually contains liquid or air
a food storage sac
an air/egg sac
Cite this Entry
“Sac.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/sac. Accessed 23 Jun. 2026.
Copy Citation
