You know what it looks like… but what is it called?
TAKE THE QUIZ“Greek letter”
The following 3 entries include the term Greek letter.
Greek-letter fraternity
noun: a fraternity designated by usually three Greek letters
Greek-letter society
noun: a Greek-letter fraternity or sorority
Greek-letter sorority
noun: a sorority designated by usually three Greek letters
Love words? Need even more definitions?
Merriam-Webster unabridged