a. [ L. anfractuosus, fr. anfractus a turning, a winding, fr. the unused anfringere to wind, bend; an-, for amb- + fractus, p. p. of frangere to break: cf. F. anfractueux. ] Winding; full of windings and turnings; sinuous; tortuous; as, the anfractuous spires of a horn. -- An*frac"tu*ous*ness, n. [1913 Webster]