Sac

usgb/sæk/
noun

A bag-like structure in an animal or a plant, typically containing fluid.

The spider injected its venom from a sac in its body into the bug.
Visual representation of "sac" - A bag-like structure in an animal or a plant, typically containing fluid.

Often appears as...

  • venom sac
  • air sac

Usage tips

Technical

Definition 1 of 2
Visual representation of "sac"
LampPro Tip 1/3

Species Specific

The sacs in different species can have specialized functions, so provide context.

Illustration for Species Specific
Birds use air sacs to assist with breathing, unlike mammals.
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Animal and Plant Use

Indicate when a sac is part of a plant's or an animal's biology to avoid ambiguity.

Illustration for Animal and Plant Use
The seed sacs in the flower pod burst open, scattering seeds everywhere.
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Technical Vocabulary

Use 'sac' in contexts related to biology or anatomy to show its technical nature.

Illustration for Technical Vocabulary
During the dissection, we examined the ink sac of the squid.
Visual representation of the word "Sac"

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