a bag-like structure in an animal or plant, often containing liquids or gases, a pouch or pouch-shaped structure in an organ or part of the body

air sac, amniotic sac, bursa sac

Formal and Informal Expressions of sac

In different contexts, you can replace 'sac' with suitable alternatives. In a more formal setting, 'pouch, bladder' is apt. In informal speech or writing, 'bag, pocket' is a commonplace synonym.

sac: Explore its Definition & Usage

sac Definition

1a bag-like structure in an animal or plant, often containing liquids or gases
2a pouch or pouch-shaped structure in an organ or part of the body

Using sac: Examples

Take a moment to familiarize yourself with how "sac" can be used in various situations through the following examples!

Example
The stomach has a sac-like structure called the gastric sac.
Example
The plant's leaves contain sacs filled with chlorophyll.
Example
The bird's crop is a sac that stores food before it enters the stomach.

sac Synonyms and Antonyms

Synonyms for sac

Phrases with sac

air sac
a thin-walled sac in the respiratory system of birds that aids in breathing
Example
Birds have air sacs that help them breathe more efficiently.
amniotic sac
the fluid-filled sac that surrounds and protects a developing fetus in the womb
Example
The amniotic sac ruptured, signaling the start of labor.
bursa sac
a small fluid-filled sac located between a tendon and a bone that helps to reduce friction
Example
The bursa sac in his knee was inflamed, causing pain and swelling.

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Summary: sac in Brief

The term 'sac' [sæk] refers to a bag-like structure found in animals or plants, often containing liquids or gases. It can also refer to a pouch or pouch-shaped structure in an organ or part of the body. Examples include the gastric sac in the stomach, air sacs in birds, and bursa sacs between tendons and bones.