Gaster

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Gaster may refer to:

• Stomach (Greek: {{lang|el|Gaster}})
• Gaster (insect anatomy)
• a trade name of famotidine, an inhibitor of stomach acid production
• Gaster (surname)
• W. D. Gaster, a character from the video game Undertale.
• Sir Gaster, a character from François Rabelais's book Le Quart Livre.
• Gaster, a character in the television series PaRappa the Rapper
• Gaster (district), a constituency in St. Gallen, Switzerland

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