mod. comb. form of L. quadrātus or quadrātum, QUADRATE a. or sb.1; used in some scientific terms.
† 1. Math. Quadrato-cubic a., of the fifth power or degree. Quadrato-qaadrat(e, the fourth power. Quadrato-quadratic, -quadratical adjs., of the fourth power; biquadratic. Obs.
1662. Hobbes, Seven Prob., Wks. 1845, VII. 67. There be some numbers called plane … others *quadrato-cubic.
1787. Waring, in Phil. Trans., LXXVII. 81. Biquadratic and quadrato-cubic equations.
1684. T. Baker, Geometr. Key, d 2. The *Quadrato-quadrat of x, x4.
1728. Clarke, in Phil. Trans., XXXV. 387. The Cube, or the quadrato-quadrate, or any other Power of the Velocity of the moving Ball.
1674. Petty, Disc. Dupl. Proportion, 45. To have like Vessels … equally strong, the Timber of which they consist must be *Quadrato-quadratic.
1677. Baker, in Rigaud, Corr. Sci. Men (1841), II. 18. The geometrical constructions of all cubic, and quadrato-quadratic equations.
1668. Barrow, ibid. 63. When the equations are *quadrato-quadratical.
2. Zool. Connected with or pertaining to the quadrate together with some other bone, as Quadrato-jugal a. and sb. (see quot. 1878), -mandibular, -(meta)pterygoid, -squamosal adjs. (see the second element).
1870. Rolleston, Anim. Life, 18. The quadratojugal rod.
1878. Bell, Gegenbaur’s Comp. Anat., 462. In Birds the quadrato-jugal is a slender piece of bone, which arises from the side of the mandibular joint of the quadrate.
1888. Rolleston & Jackson, Anim. Life, 338. The quadrate or in Teleostei … the quadrato-metapterygoid.
3. Cryst. Quadratoctahedron, an eight-sided crystal of square section through the secondary axes.
1884. Bower & Scott, De Bary’s Phaner., 137. The fundamental form of the crystals belonging to the quadratic system is the quadratoctahedron.
