S.T.D.
Spanish, noun
S.T.D. is a Spanish masculine noun meaning “total dissolved solids” (English Wiktionary, September 2026).
What does S.T.D. mean in English?
noun
- 1
masculinetotal dissolved solids
Source: English Wiktionary, Spanish section, dump of September 2, 2026 (CC BY-SA 4.0).