Anfractuosity \An*frac`tu*os"i*ty\, n.; pl. {Anfractuosities}. [Cf. F. anfractuosit['e].] 1. A state of being anfractuous, or full of windings and turnings; sinuosity. The anfractuosities of his intellect and temper. --Macaulay. 2. (Anat.) A sinuous depression or sulcus like those separating the convolutions of the brain.