Anfractuosity

noun

1. The condition or quality of having many twists and turns.
2. A winding channel, passage, or crevice.
3. A complicated or involved process.
4. The state or quality of being anfractuous, or full of windings and turnings.
5. In anatomy, specifically, one of the sulci or fissures of the brain, separating the gyri or convolutions. See cut under cerebral.