Math. Obs. rare1. [f. QUA(DRI-) + QUADRATE.] A sixteenth power.

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1674.  Jeake, Arith. (1696), 273. Some to shorten and facilitate the long Names of such Higher Powers,… call ȜȜ a Biquadrate,… ȜȜȜȜ a Quaquadrate, ȜȜȜȜȜ a Quinquadrate &c.

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