Definitions

from the GNU version of the Collaborative International Dictionary of English.

  • A combining form from Gr. �, �, water (see hydra).
  • (Chem.) A combining form of hydrogen, indicating hydrogen as an ingredient

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • prefix water
  • prefix chemistry hydrogen
  • prefix mineralogy a hydrous compound
  • prefix zoology Hydrozoa

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek ὑδρο- (hydro-), from ὕδωρ (hydor, "water")

Examples

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