n. 千回百折, 错综复杂, 弯曲的道路

[医] 纡曲, 弯曲, 脑沟

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.