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arc

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arc

In geometry, a section of a curved line or circle. A circle has three types of arc: a semicircle, which is exactly half of the circle; minor arcs, which are less than the semicircle; and major arcs, which are greater than the semicircle.

An arc of a circle is measured in degrees, according to the angle formed by joining its two ends to the centre of that circle. A semicircle is therefore 180°, whereas a minor arc will always be less than 180° (acute or obtuse) and a major arc will always be greater than 180° but less than 360° (reflex).



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? Mentioned in ? References in classic literature
 
The cudgel was swinging in the arc which ended upon my upturned face when a bolt of myriad-legged horror hurled itself through the doorway full upon the breast of my executioner.
A Princess of Mars by Burroughs, Edgar Rice View in context
From one lofty branch the agile creature swung with Clayton through a dizzy arc to a neighboring tree; then for a hundred yards maybe the sure feet threaded a maze of interwoven limbs, balancing like a tightrope walker high above the black depths of verdure beneath.
Tarzan of the Apes by Burroughs, Edgar Rice View in context
Then, plunging into the Gulf of Mexico, it subtends the arc formed by the coast of Alabama, Mississippi, and Louisiana; then skirting Texas, off which it cuts an angle, it continues its course over Mexico, crosses the Sonora, Old California, and loses itself in the Pacific Ocean.
From The Earth To The Moon by Verne, Jules View in context
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