Polyanthus \Pol`y*an"thus\ (p[o^]l`[i^]*[a^]n"th[u^]s), n.; pl. {Polyanthuses}. [NL., fr. Gr. poly`anqos rich in flowers; poly`s many + 'a`nqos flower.] [Written also {polyanthos}.] (Bot.) (a) The oxlip. So called because the peduncle bears a many-flowered umbel. See {Oxlip}. (b) A bulbous flowering plant of the genus {Narcissus} ({Narcissus Tazetta}, or {Narcissus polyanthus} of some authors). See Illust. of {Narcissus}. [1913 Webster]