zenzizenzic
The fourth power of a number; the biquadrate.
obsolete
Take the Zenzizenzike Number of the last Quotient Figure, and with the 3 numbers last above-mentioned, add them (duely placed one nearer than another to the Right Hand) into one total Gnonom, and subtract the same from the given Number : And if the number have more Pricks than 2, the work in the second, third, fourth and fifth Directions is to be repeated.
Where it comes from
Coined by Robert Recorde (as zenzizenzike) in his 1557 mathematics book The Whetstone of Witte, from the root word zenzic.
Adapted from the Wiktionary entry zenzizenzic (CC BY-SA 4.0).