https://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/greek-letter-society
Greek-letter society | Encyclopedia.com
Greek-letter society: see fraternity. Source for information on Greek-letter society: The Columbia Encyclopedia, 6th ed. dictionary.
greek letter societyencyclopedia
https://www.merriam-webster.com/dictionary/Greek-letter%20society
GREEK-LETTER SOCIETY Definition & Meaning - Merriam-Webster
The meaning of GREEK-LETTER SOCIETY is a Greek-letter fraternity or sorority.
greek letter societydefinitionmeaningmerriamwebster