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The Clue
Element used in photoelectric cells (8 letter answer)
The Answer
SELENIUM
Tags
Notes
The answer SELENIUM is so rare that it appears less than once every 2500 puzzles.
Related Clues
Element #34
Definition
SELENIUM as a noun:
1. (selenium, Se, atomic number 34) = a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)