The Collaborative International Dictionary of English v.0.48:

Flagellate \Flag"el*late\, 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]

The Collaborative International Dictionary of English v.0.48:

flagellated \flagellated\ adj.
   1. resembling a flagellum or flagella.

   Syn: flagellate[1].
        [WordNet 1.5]

   2. having a flagellum or flagella.

   Syn: flagellate[3].
        [PJC]

WordNet (r) 3.0 (2006):

flagellated
    adj 1: having or resembling a lash or whip (as does a flagellum)
           [syn: flagellate, flagellated, whiplike, lash-
           like]