a bulbous plant of the genus hyacinthus, bearing beautiful spikes of fragrant flowers. h. orientalis is a common variety.-a plant of the genus camassia (c. farseri), called also eastern camass; wild hyacinth.-the name also given to scilla peruviana, a mediterranean plant, one variety of which produces white, and another blue, flowers; -- called also, from a mistake as to its origin, hyacinth of peru.-a red variety of zircon, sometimes used as a gem. see zircon.