flex·u·ous \ˈflekshəwəs\adjective alsoflex·u·ose\-ˌwōs\ Etymology: Latin flexuosus, from flexus + -osus -ous, -ose 1. a.: having turns or windings < the flexuous bed of the stream > b.botany: having alternate opposite curvatures : zigzag, wavy < leaves with flexuous margins > 2.: lacking rigidity in structure or action : flexible: as a.: adaptable b.: flickering, undulating < flexuous shadows > • flex·u·ous·lyadverb