Gaster

Definition

The part of the abdomen of certain insects, particularly hymenopterans like ants, bees, and wasps, which is located behind the petiole and contains the digestive tract and reproductive organs.

Etymology

Derived from Greek 'gastēr', meaning 'stomach' or 'belly'.

Example

In ants, the gaster is the prominent part of the abdomen that stores food and houses the reproductive organs and sting apparatus.

Synonyms

• Abdomen (for general context)

Related Terms

• Petiole
• Hymenoptera
• Sting
• Reproductive organs

Usage Notes

The term is specific to certain insect families, particularly within the order Hymenoptera, and is not typically used for the abdominal region of other insects.