Sentence:  <WSD>CHLOROPHANE</WSD>. The Amelia Court House, Va., locality yields a bluegreen fluorescing <WSD>chlorophane</WSD>. Kunz and Baskerville qualitatively studied the emission from Chlorophane in 1903. (See also the discussion for Fluorite which is also ... 
Meaning of the word marked with <WSD> tags:  A variety of fluorspar, which, when heated, gives a striking emerald-green light.