1 (also quadrate bone) Zoology (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.
- Most significantly, however, the prootic articulates with the quadrate.
- Both the quadrate and the symplectic articulate with the articular of the lower jaw.
- Both quadrates are preserved in articulation with the respective mandibles.
Roughly square or rectangular.
- The last preserved volution has a quadrate outline.
- Among the common shapes are triangular, circular, rhomboidal, quadrate, trapezoidal, and elliptical.
- It was a typically quadrate teapot with a square spout and square handle, made during the Qing Dynasty.
Late Middle English (as an adjective): from Latin quadrat- 'made square', from the verb quadrare, from quattuor 'four'.
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