1. (chemistry) hydrogen
   - hydro- 
2. Water
   - hydro-

Encyclopedia: Hydr-

• tensor tympani
• tent
• tent caterpillar
• tent flap
• tent peg
• tent stitch
• tent-caterpillar moth
• tent-fly
• tentacle
• tentacled
• tentacular
• Tentaculata
• tentage
• tentation
• tentative
• tentatively
• tentativeness
• tenter
• tenterhook
• tenth
• tenth cranial nerve
• tenth part
• tenthly
• Tenthredinidae
• tenting