| 单词 | concave |
| 释义 | concave (once / 2857 pages) adj Concave describes an inward curve; its opposite, convex, describes a curve that bulges outward. They are used to describe gentle, subtle curves, like the kinds found in mirrors or lenses. A valley is a concave curve, a mountain is a convex curve—you can remember this by thinking that things that vex you tend to stick out, and that caves tend to be holes that go in, like valleys or innie belly buttons. If you want to describe a bowl, you might say there is a large blue spot on the center of the concave side. WORD FAMILYconcave: biconcave, concavely, concaveness, concavity+/concavity: concavities USAGE EXAMPLESPeople the size of ants suddenly swarmed across the concave surface. The Guardian(Dec 24, 2016) When characters quail in terror, their backbones turn concave. Washington Post(Dec 14, 2016) When masons install grout, they run a tool over it that creates a recessed surface, usually concave. Washington Post(Nov 11, 2016) adj curving inward Syn|Ant acetabular, cotyloid, cotyloidal of the cup-shaped socket that receives the head of the thigh bone biconcave, concavo-concaveconcave on both sides boat-shapedhaving a concave shape like a boat bowl-shapedhaving a concave shape with an open top like a bowl bursiform, pouch-shaped, pouchlike, saclikeshaped like a pouch concavo-convexconcave on one side and convex on the other with the concavity being greater than the convexity cuplikeresembling the shape of a cup cupular, cupulateshaped like (or supporting) a cupule dish-shaped, dished, patelliformshaped like a dish or pan planoconcaveflat on one side and concave on the other recessedresembling an alcove saucer-shapedhaving a concave shape like a saucer umbilicatedepressed like a navel urn-shapedhaving a concave shape like an urn intrusivethrusting inward bulging, convex curving or bulging outward bell-shapedhaving a convex shape that resembles a bell biconvex, convexo-convex, lenticular, lentiformconvex on both sides; shaped like a lentil broken-backed, hogged(of a ship) so weakened as to sag at each end convexo-concaveconvex on one side and concave on the other with the convexity being greater than the concavity gibbose, gibbous(used of the moon) more than half full helmet-shapedhaving the convex shape of a helmet planoconvexflat on one side and convex on the other umbel-like, umbellateresembling an umbel in form protrusivethrusting outward |
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英语词典包含147318条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。