Enter a clue or pattern or both:
The Clue
Simple hydrocarbon (6 letter answer)
The Answer
ETHYNE
Tags
Notes
The answer ETHYNE is so rare that it appears less than once every 2500 puzzles.
Definition
ETHYNE as a noun:
1. (acetylene, ethyne, alkyne) = a colorless flammable gas used chiefly in welding and in organic synthesis