[1880–85; helio- + -gram1]This word is first recorded in the period 1880–85. Other words that entered Englishat around the same time include: highball, jackpot, pari-mutuel, quotation mark, regionalism-gram is a combining form occurring in loanwords from Greek, where it meant “somethingwritten,” “drawing” (epigram; diagram). On this model, -gram is used in the formation of compound words (oscillogram)