noun Download 🔗Share A concave surface or curve. Examples : "The inside of the bowl is a concave shape. " architecture math science Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share The vault of the sky. Examples : "The vast concave of the night sky was dotted with stars. " astronomy space Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share One of the celestial spheres of the Ptolemaic or geocentric model of the world. Examples : "Aristotle makes [Fire] to move to the concave of the Moon. - Thomas Salusbury (1661)." astronomy world space theory mythology Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting. Examples : "The miner carefully adjusted the concave in the sifting machine to better separate the gold from the gravel. " agriculture machine part technical Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share An indentation running along the base of a surfboard, intended to increase lift. Examples : "The concave on the bottom of the surfboard increases lift, making it easier to ride waves. " sport technical nautical Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength. Examples : "The concave on the skateboard allowed the skater to maintain a firm grip. " sport technical structure vehicle device Chat with AIVocabulary GamePractice Reading
verb Download 🔗Share To render concave, or increase the degree of concavity. Examples : "The sculptor used a special tool to concave the inside of the bowl further, creating a deeper depression. " appearance structure technical Chat with AIVocabulary GamePractice Reading
adjective Download 🔗Share Curved like the inner surface of a sphere or bowl Examples : "The inside of the soup bowl was concave, making it perfect for scooping up the last bits of soup. " appearance Chat with AIVocabulary GamePractice Reading
adjective Download 🔗Share (of a polygon) not convex; having at least one internal angle greater than 180 degrees. Examples : "The shape of the garden plot was concave, with a large inward curve in one section. " math technical structure science Chat with AIVocabulary GamePractice Reading
adjective Download 🔗Share (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. Examples : "The graph of the student's test scores showed a concave pattern; each segment connecting two test scores lay below the curve. " math function technical Chat with AIVocabulary GamePractice Reading
adjective Download 🔗Share Hollow; empty Examples : "The old, concave dish was almost empty after the family dinner. " appearance architecture anatomy math science technical Chat with AIVocabulary GamePractice Reading