Enter a clue or pattern or both:
The Clue
Metal that may ignite if scratched (6 letter answer)
The Answer
CERIUM
Tags
Notes
The answer CERIUM is so rare that it appears less than once every 2500 puzzles.
Related Clues
One of the lanthanides
Definition
CERIUM as a noun:
1. (cerium, Ce, atomic number 58) = a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group