a. [ Pref. bi- + flagellate. ] Having two long, narrow, whiplike appendages. [ 1913 Webster ]

n. and order of plankton, in some classifications it is considered a phylum of the kingdom Protista; in others it is included in the plant phylum Pyrrophyta. Its members usually have two flagella, one of which extends from its center.
Syn. -- order Dinoflagellata, Cilioflagellata, order Cilioflagellata. [ WordNet 1.5 +PJC ]

n. a member of the Dinoflagellata, chiefly marine protozoa having two flagella. The dinoflagellates form a chief constituent of plankton. [ WordNet 1.5 ]

n. [ L. flagellans, p. p. of flagellare: cf.F. flagellant. See Flagellate. ] (Eccl. Hist.) One of a fanatical sect which flourished in Europe in the 13th and 14th centuries, and maintained that flagellation was of equal virtue with baptism and the sacrament; -- called also disciplinant. [ 1913 Webster ]

‖n. pl. [ NL., fr.L. flagellatus, p. p. See Flagellate, v. t. ] (Zool.) An order of Infusoria, having one or two long, whiplike cilia, at the anterior end. It includes monads. See Infusoria, and Monad. [ 1913 Webster ]

v. t. [ imp. & p. p. Flagellated p. pr. & vb. n. Flagellating ] [ L. flagellatus, p. p. of flagellare to scoure, fr. flagellum whip, dim. of flagrum whip, scoure; cf. fligere to strike. Cf. Flall. ] To whip; to scourge; to flog. [ 1913 Webster ]

a. 1. Flagelliform. [ 1913 Webster ]

2. (Zool.) Of or pertaining to the Flagellata. [ 1913 Webster ]

3. Having a flagellum or flagella. [ PJC ]

adj. 1. resembling a flagellum or flagella.
Syn. -- flagellate{ 1 }. [ WordNet 1.5 ]

2. having a flagellum or flagella.
Syn. -- flagellate{ 3 }. [ PJC ]

n. [ L. flagellatio: cf. F. flagellation. ] A beating or flogging; a whipping; a scourging. Garth. [ 1913 Webster ]

n. One who practices flagellation; one who whips or scourges. [ 1913 Webster ]

‖n. pl. [ NL. See Radiate, and Flagellata. ] (Zool.) A group of Protozoa having both flagella and pseudopodia. [ 1913 Webster ]

a. [ Uni- + flagellate. ] (Biol.) Having but one flagellum; as, uniflagellate organisms. [ 1913 Webster ]