| SPH | a ring of muscle that contracts to close an opening |
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| SPH | any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed |
| SPH | hawkmoths |
| SPH | sphinx-like |
| SPH | one of a number of large stone statues with the body of a lion and the head of a man that were built by the ancient Egyptians |
| SPH | an inscrutable person who keeps his thoughts and intentions secret |
| SPH | (Greek mythology) a riddling winged monster with a woman's head and breast on a lion's body |
| SPH | any of various moths with long narrow forewings capable of powerful flight and hovering over flowers to feed |
| SPH | a pressure gauge for measuring blood pressure |
| SPH | type and sole genus of the Sphyraenidae: barracuda |
| SPH | large (up to 6 ft) grayish-brown barracuda highly regarded as a food and sport fish |
| SPH | monotypic family of large active fishes of tropical and subtropical waters: barracuda |