Definitions for "Gaster"
The posteriormost of the three main body regions of a chalcid, which looks like the insect abdomen but excludes both the first 'true' abdominal segment, the propodeum, and the second 'true' abdominal segment, the petiole (see also metasoma). [drawing
The most posterior body section of Hymenoptera, which consists of all abdominal segments except the first. The first abdominal segment is fused to the thorax and forms the propodeum (Fig. 62).
the remaining abdominal segments after the waist or pedicel; the enlarged part of the abdomen that is usually referred to as the abdomen, proper.
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Keywords:  belly, skeletal, stomach, muscle, body
The stomach; the body, or belly, of a skeletal muscle.
To gast.