Strontium was an element on the periodic table.
"Every cloud has a strontium lining" was a saying on Earth according to Morgus. (PROSE: The Caves of Androzani [+]Loading...["The Caves of Androzani (novelisation)"])
Strontium-90 was a deadly isotope of strontium. (PROSE: Death to Mufl [+]Loading...["Death to Mufl (short story)"], Death and Diplomacy [+]Loading...["Death and Diplomacy (novel)"], Ghost Devices [+]Loading...["Ghost Devices (novel)"])
Thorgan tried to blow up Octavian's villa with a strontium grenade. The Eighth Doctor planted the grenade on Thorgan, who blew himself up in up instead. (PROSE: The Gallifrey Chronicles [+]Loading...["The Gallifrey Chronicles (novel)"])
The Tenth Doctor could recongnise the smell of burnt out strontium circuits. (PROSE: The Vampire of Paris [+]Loading...["The Vampire of Paris (novel)"])