STH or sth can refer to:
- Abbreviation of something (concept)
- STH (gene), a human gene
- S.T.H., or Straight To Hell, a gay pornography zine
- Saint Helena, Ascension and Tristan da Cunha, UNDP country code
- Somatotropin hormone or growth hormone
- Secretary for Transport and Housing, of the Government of Hong Kong
- Soil-transmitted helminth, a type of parasitic worm
- Soil-transmitted helminthiasis, caused by soil-transmitted helminths
- Sonic the Hedgehog
This disambiguation page lists articles associated with the title Sth.
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