[mass noun] Strontium oxide, a white solid resembling quicklime.
- ‘Baryta, lime, and strontia behave in the same way.’
- ‘The correctness of the rate of solubility of the strontia carbonate as given by Bineau is thus confirmed.’
- ‘Nearly two decades later, Davy showed that strontia was a compound of a metal and oxygen, a metal to which the name strontium was then given.’
Early 19th century: from earlier strontian, denoting native strontium carbonate from Strontian, a parish in the Highland region of Scotland, where it was discovered.