gas·ter 
(găstər)
(găstər)n.
The portion of the abdomen behind the petiole in ants and other hymenopterous insects.
[Greek gastēr, belly.]
- hydroponicist
- hydroponics
- hydroponist
- hydropower
- hydroquinol
- hydroquinone
- hydroscope
- hydroscopic
- hydrosol
- hydrosolic
- hydrospace
- hydrosphere
- hydrospheric
- hydrostatic
- hydrostatical
- hydrostatically
- hydrostatic equilibrium
- hydrostatic pressure
- hydrostatics
- hydrosulfate
- hydrosulfide
- hydrosulfite
- hydrosulfurous acid
- hydrotactic
- hydrotaxis