| 单词 | arc |
| 释义 | arc (once / 847 pages) 1nv 2n An arc is a curve. You can describe the bend of a rainbow as an arc. In math, an arc is one section of a circle, but in life you can use the word to mean any curved shape, like the arc of a ballerina's arm or the graceful arc of a flowering vine over a trellis. In the 14th century, arc first meant the movement of the sun in the sky, from the Old French arc, "bow or arch," and the Latin root arcus, also "bow or arch." WORD FAMILYarc: arced, arcing, arcs, arcuate USAGE EXAMPLESBut Harley stopped, set his feet, and tossed an arcing pass toward the end zone. The New Yorker(Jan 01, 2017) Montana shot 26 of 65 from the field and knocked down 10 of 17 shots from beyond the arc. Washington Times(Dec 31, 2016) Thomas erased the deficit with consecutive 3-pointers, then added another from beyond the arc with 7:14 left to put Boston up 93-89. Washington Times(Dec 30, 2016) 1 1n a continuous portion of a circle Hypo|Hyper limb the graduated arc that is attached to an instrument for measuring angles curve, curved shape the trace of a point whose direction of motion changes 2n something curved in shape Syn|Hypo|Hyper bow rainbow an arc of colored light in the sky caused by refraction of the sun's rays by rain curve, curved shape the trace of a point whose direction of motion changes 3v form an arch or curve 2Syn|Hypo|Hyper arch, curve camber curve upward in the middle bend, flex form a curve n electrical conduction through a gas in an applied electric field Syn|Hypo|Hyper discharge, electric arc, electric discharge, spark brush discharge discharge between electrodes creating visible streamers of ionized particles Saint Elmo's fire, Saint Elmo's light, Saint Ulmo's fire, Saint Ulmo's light, St. Elmo's fire, corona, corona discharge, corposant, electric glowan electrical discharge accompanied by ionization of surrounding atmosphere flashoveran unintended electric discharge (as over or around an insulator) electrical conduction the passage of electricity through a conductor |
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