nounπShareA concave surface or curve."The inside of the bowl is a concave shape. "architecturemathscienceChat with AIVocabulary GamePractice Reading
nounπShareThe vault of the sky."The vast concave of the night sky was dotted with stars. "astronomyspaceChat with AIVocabulary GamePractice Reading
nounπShareOne of the celestial spheres of the Ptolemaic or geocentric model of the world."Aristotle makes [Fire] to move to the concave of the Moon. - Thomas Salusbury (1661)."astronomyworldspacetheorymythologyChat with AIVocabulary GamePractice Reading
nounπShareAn element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting."The miner carefully adjusted the concave in the sifting machine to better separate the gold from the gravel. "agriculturemachineparttechnicalChat with AIVocabulary GamePractice Reading
nounπShareAn indentation running along the base of a surfboard, intended to increase lift."The concave on the bottom of the surfboard increases lift, making it easier to ride waves. "sporttechnicalnauticalChat with AIVocabulary GamePractice Reading
nounπShareAn indented area on the top of a skateboard, providing a position for foot placement and increasing board strength."The concave on the skateboard allowed the skater to maintain a firm grip. "sporttechnicalstructurevehicledeviceChat with AIVocabulary GamePractice Reading
verbπShareTo render concave, or increase the degree of concavity."The sculptor used a special tool to concave the inside of the bowl further, creating a deeper depression. "appearancestructuretechnicalChat with AIVocabulary GamePractice Reading
adjectiveπShareCurved like the inner surface of a sphere or bowl"The inside of the soup bowl was concave, making it perfect for scooping up the last bits of soup. "appearanceChat with AIVocabulary GamePractice Reading
adjectiveπShare(of a polygon) not convex; having at least one internal angle greater than 180 degrees."The shape of the garden plot was concave, with a large inward curve in one section. "mathtechnicalstructurescienceChat with AIVocabulary GamePractice Reading
adjectiveπShare(of a real-valued function on the reals) satisfying the property that all segments connecting two points on the function's graph lie below the function."The graph of the student's test scores showed a concave pattern; each segment connecting two test scores lay below the curve. "mathfunctiontechnicalChat with AIVocabulary GamePractice Reading
adjectiveπShareHollow; empty"The old, concave dish was almost empty after the family dinner. "appearancearchitectureanatomymathsciencetechnicalChat with AIVocabulary GamePractice Reading
