catchword
catch.word \'kach-.w*rd, 'kech-\ n 1a: a word under the right-hand side of the last line on a book page that r epeats the first word on the following page 1b: either of the terms to right and left of the head of a page of an alpha betical reference work (as a dictionary) indicating the alphabetically first and last entries on the page 2: a word or expression repeated until it becomes representative of a party , school, or a point of view