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Look up hypostome in Wiktionary, the free dictionary.
In zoology, the hypostome can refer to structures in distinct animal groups:
- Hypostome (trilobite), the ventral mouthpart plate in trilobites
- Hypostome (tick), the barbed attachment structure associated with the mouthparts of parasitic arachnids
- Hypostome (cnidarian), the oral tip surrounded by tentacles in hydrozoan cnidarians