n a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
n eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies
n the clandestine military wing of the Jewish leadership during the British rule over the mandate of Palestine from 1920 to 1948; became the basis for the Israeli defense force