Anfractuosity
ANFRACTUOSITY (from Lat. anfractuosus, winding), twisting and turning, circuitousness; a word usually employed in the plural to denote winding channels such as occur in the depths of the sea, mountains, or the fissures (sulci) separating the convolutions of the brain, or, by analogy, in the mind.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)