from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several devices used to measure phosphorescence, and to distinguish it from fluorescence
from the GNU version of the Collaborative International Dictionary of English
- n. An apparatus for observing the phosphorescence produced in different bodies by the action of light, and for measuring its duration.
from The Century Dictionary and Cyclopedia
- n. An instrument for. measuring the duration of evanescent, phospho' resceuce in different substances.
- n. A philosophical toy consisting of glass tubes containing different phosphorescent substances and arranged in a box.
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