The clue "18th Greek letter" last appeared in the The Telegraph Quick crossword on July 13, 2020. The correct answer for this puzzle is "SIGMA", a 5-letter word.
Solution SIGMA is 5 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is SIGMA with 5 letters, and the shortest is SIGMA with 5 letters.
Indeed, the puzzle clue "18TH GREEK LETTER" has seen a surge in lookups recently (last checked: 24 Aug 2026). Apparently it´s giving players some headaches!
Use our smart search feature to filter by word length. Our system organizes results by frequency and relevance. Search through millions of answers to thousands of crossword clues—for free!
The solution is 5 letters long.