The Collaborative International Dictionary
Biflagellate
Biflagellate \Bi`fla*gel"late\, a. [Pref. bi- + flagellate.] Having two long, narrow, whiplike appendages.
Wiktionary
biflagellate
a. Having two flagellum n. Any organism that has two flagella
WordNet
biflagellate
adj. having two flagella; "a biflagellate zoospore"