potassa /pə-tasˈə/ (chem; now rare)

1. Potash
2. Potassium monoxide or potassium hydroxide
3. Formerly used for potassium in compound names, eg carbonate of potassa

• on prescription
• on principle
• on purpose
• on record
• on remand
• on request
• onrush
• onrushes
• ons
• ONS
• on schedule
• on-screen
• on second thoughts
• onset
• onsets
• onsetter
• onsetters
• onsetting
• onsettings
• on shaky ground
• on shipboard
• on shore
• on-shore
• onshore
• onside