1) Strontian 
• (n.) An earth of a white color resembling lime in appearance, and baryta in many of its properties. It is an oxide of the metal strontium.
Stron'ti·a noun [ New Latin strontia , from Strontian , in Argyleshire, Scotland, where strontianite was first found.] (Chemistry) An earth of a white color resembling lime in appearance, and baryta in many of its properties. It is an oxide of the metal strontium. 
Also calleda white or grayish-white, amorphous powder, SrO, resembling lime in its general character: used chiefly in the manufacture of strontium salts. · See