concavity C2 Topic:Abstract Ideas US /kənˈkævəti/ UK /kɒnˈkævɪti/ See IPA manual Freq #198344 Meanings 1 noun the quality or state of curving inward; the property of being concave The mirror's concavity causes parallel rays to converge. 2 noun a hollow, recess, or inward-curving surface Rainwater collected in a shallow concavity in the rock. Thesaurus Synonyms 1 noun · the quality or state of... concavenessinward curvature 2 noun · a hollow, recess, or... hollowrecessincurvation ↔ Opposites convexitybulge Word family Derived forms biconcavitymonoconcavitypseudoconcavityquasiconcavity Related forms concavecavitycurvature Etymology From Old French concavite and Late Latin concavitas, from Latin concavus ("hollow, arched inward"), combining con- with cavus ("hollow"). Morphologically, concave + -ity. Topics Abstract Ideas Word Formation & Derivatives External links Google Images Cambridge Dictionary Wiktionary # concavity **Type:** Word **Level:** C2 **Part of speech:** noun **IPA (US):** /kənˈkævəti/ **IPA (UK):** /kɒnˈkævɪti/ **Frequency rank:** 198344 ## Meanings 1. the quality or state of curving inward; the property of being concave 2. a hollow, recess, or inward-curving surface ## Examples - The mirror's concavity causes parallel rays to converge. - Rainwater collected in a shallow concavity in the rock. ## Synonyms - concaveness - inward curvature - hollow - recess ## Antonyms - convexity - bulge ## Derived Forms - biconcavity - monoconcavity - pseudoconcavity - quasiconcavity ## Related Forms - concave - cavity - curvature ## Etymology From Old French concavite and Late Latin concavitas, from Latin concavus ("hollow, arched inward"), combining con- with cavus ("hollow"). Morphologically, concave + -ity. ## Topics - Abstract Ideas - Word Formation & Derivatives markdown