SEMAPHORE

I. noun Etymology: Greek sēma sign, signal + International Scientific Vocabulary -phore Date: 1816 an apparatus for visual signaling (as by the position of one or more movable arms), a system of visual signaling by two flags held one in each hand, II. verb (-phored; -phoring) Date: 1893 transitive verb to convey (information) by or as if by ~, intransitive verb to send signals by or as if by ~