anfractuosity

noun

1. (countable, uncountable)A winding channel or crevice, such as occur in the depths of the sea or in mountains.

   “Here endeth the doctrine of the right-angled sphericalls, the whole diatyposis wherof is in the Equisolea or hippocrepidian diagram, whose most intricate amfractuosities, renvoys, various mixture of analogies, and perturbat situation of proportionall termes, cannot choose but be pervious to the understanding of any judicious reader that hath perused this comment aright.”

   “Amfractuosity.”

   “They do not always elevate their polyparies from the depths of the waters to their surface, some extend themselves horizontally upon the bottom of the sea, following its curvatures, declivities, and anfractuosities, and cover the soil of old ocean with an enamelled carpet of various and brilliant colours, sometimes of a single colour as dazzling as the purple of the ancients.”

   “At this moment, the Sun, sympathizing with these thoughts of love, or of the future, has cast on the tawny sides of this rock, an ardent light; some mountain flowers called attention, the calm and the silence enlarged this anfractuosity, sombre in reality, colored by the dreamer; then it was beautiful with its scant vegetation, its warm chamomillas, its hair of Venus with the velvet leaves; a festival prolonged, magnificent decorations, happy exaltation of human forces!'”

   “There are chance anfractuosities of ruin in the upper portions of the Coliseum which offer a very fair imitation of the rugged face of an alpine cliff.”

2. (countable, uncountable)One of the fissures (sulci) separating the convolutions of the brain, or, by analogy, in the mind.

   “The vayne goeth aboue the artier, but not right lyne as other parts doe, but in anfractuosities, like unto a Woodbine.”

   “The first or most anterior anfractuosity on the superior surface of the brain is longitudinal, and being the continuation and termination of the principal one on the inferior surface, it extends a very short distance from before backwards.”

   “The great anfractuosity, called the fissure of Sylvius, divides the convolutions of the inferior surface into those of the anterior and those of the middle and posterior lobe.”

   “The brain is a mass of grey and white matter, somewhat oval in shape, with fissures and indentations dividing it into convolutions or gyri, with smaller subdivisious mapped out by sulci and anfractuosities. (Sulci is the plural of sulcus, which means a furrow. An anfractuosity is a winding or turning.)”