1. a word printed at the top of the page of a dictionary or other reference book to indicate the first or last item on that page; [syn: guide word, guideword, catchword]
WordNet (r) 3.0 (2006):
guide word
n 1: a word printed at the top of the page of a dictionary or
other reference book to indicate the first or last item on
that page [syn: guide word, guideword, catchword]