The term PREFIX FOR GRAM can be solved by three different crossword solutions: IDEO (4 letters), TELE (4 letters), and EPI (3 letters). IDEO is a prefix derived from the Greek word 'ideo' meaning 'to see'. It is commonly used in words such as 'ideogram' and 'IDEOLOGY'. TELE is a prefix derived from the Greek word 'tele' meaning 'far off'. It is commonly used in words such as 'TELEVISION' and 'TELEPHONE'. EPI is a prefix derived from the Greek word 'epi' meaning 'UPON'. It is commonly used in words such as 'epicenter' and 'EPIDEMIC'.