gas gland (CNID: Hydrozoa) In Siphonophora, glandular epithelium that secretes an air-like gas into a float.
gaster n. [Gr. gaster, stomach] 1. Stomach. 2. (ARTHRO: Insecta) The major part of the abdomen behind the pedicel in threadwaisted Hymenoptera.
gasterostome n. [Gr. gaster, stomach; stoma, mouth] (PLATY: Trematoda) Cercaria in which the sucker is on the midven-tral surface.
gasterotheca n. [Gr. gaster, stomach; theke, case] (ARTHRO: Insecta) Part of the theca or pupa case surrounding the abdomen. see somatotheca.
gastraea n. [Gr. gaster, stomach] Hypothetical adult ancestor of higher animals that all have the gastrula as a common stage in their early ontogeny.
gastraeum n. [Gr. gaster, stomach] The ventral side of a body.
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