also mid-term, "in the middle of a term" in any sense, from mid (adj.) + term (n.). By 1879 in reference to gestation; 1888 of college semesters (midterm examination is by 1900; student slang shortening midterms for these is by 1903). By 1891 in reference to U.S. congressional elections held in the middle of a four-year presidential term.
updated on January 21, 2019