concave

Etymology
From, from , from.

Adjective

 * 1) Curved like the inner surface of a sphere or bowl.
 * 2)  Not convex; having at least one internal angle greater than 180 degrees.
 * 3)  Satisfying the property that all segments connecting two points on the function's graph lie below the function.
 * 4) Hollow; empty.

Translations

 * Arabic: مُقَعَّر, مُجَوَّف
 * Armenian:
 * Asturian: cóncavu
 * Bengali:
 * Bulgarian: вдлъбнат
 * Catalan:
 * Chinese:
 * Mandarin:
 * Cornish: kowgrom
 * Czech: vydutý,
 * Danish: konkav
 * Dutch:
 * Esperanto: kava
 * Estonian: nõgus
 * Faroese: innskaraður, innhjólaður
 * Finnish: ,
 * French:
 * Galician:
 * German:, nach innen gewölbt, eingewölbt
 * Greek:
 * Hawaiian: ʻeʻele
 * Hungarian: ,
 * Icelandic: íhvolfur
 * Italian:
 * Japanese: 凹面
 * Kazakh: ойыс
 * Korean: 요면
 * Latin: concavus
 * Maori: areare
 * Norwegian:
 * Bokmål: konkav
 * Nynorsk: konkav
 * Persian:
 * Polish:
 * Portuguese:
 * Romanian:
 * Russian:
 * Slovak: dutý, vydutý, konkávny
 * Spanish:
 * Swedish:
 * Tagalog: malukong
 * Thai:
 * Turkish: ,
 * Tày: boóng
 * Vietnamese:
 * Welsh:, ceugrom

Noun

 * 1) A concave surface or curve.
 * 2) The vault of the sky.
 * 3) One 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).
 * 1)  An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.
 * 2)  An indentation running along the base of a surfboard, intended to increase lift.
 * 3)  An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.
 * 4)  A playing card made concave for use in cheating.

Translations

 * Bulgarian:
 * Kurdish:
 * Northern Kurdish:
 * Russian:
 * Thai: รูปร่างที่นูน

Verb

 * 1) To render concave, or increase the degree of concavity.

Translations

 * Bulgarian: вдлъбвам

Etymology
, borrowed from.