Definition of quadrate in English:



  • 1Zoology
    (in the skull of a bird or reptile) a squarish bone with which the jaw articulates, thought to be homologous with the incus of the middle ear in mammals.

    • ‘Both the quadrate and the symplectic articulate with the articular of the lower jaw.’
    • ‘The distal end of the pterygoid contacts the squamosal dorsally and the quadrate medially.’
    • ‘Most significantly, however, the prootic articulates with the quadrate.’
    • ‘Both quadrates are preserved in articulation with the respective mandibles.’
    • ‘Instead, the articular moves laterally relative to the quadrate as the jaw opens.’
  • 2Anatomy

    another term for quadratus


  • Roughly square or rectangular.

    • ‘It shows prominent radial and concentric trabeculae that unite in three dimensions to produce a rectangular or quadrate skeletal framework.’
    • ‘As noted earlier, 9 of the 14 quadrate characters used by Luo and Crompton were likewise reversing.’
    • ‘Among the common shapes are triangular, circular, rhomboidal, quadrate, trapezoidal, and elliptical.’
    • ‘The last preserved volution has a quadrate outline.’
    • ‘It was a typically quadrate teapot with a square spout and square handle, made during the Qing Dynasty.’


  • 1[with object] Make square.

    fit in, go together, be consistent, agree, accord, concur, coincide, match, fit, be in agreement, conform, equate, harmonize, fall in, be in tune, correlate, correspond, tally
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  • 2Conform or cause to conform.

    • ‘The crown of P3 is slightly larger and more nearly quadrate in occlusal view than P3 of N. serrator.’
    correspond, agree, tally, match up, tie in, be consistent, be in agreement, be compatible, be consonant, be congruous, be in tune, be in harmony, harmonize, coordinate, dovetail
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Late Middle English (as an adjective): from Latin quadrat- made square from the verb quadrare, from quattuor four.