Chapter R - Section R.8 - nth Roots; Rational Exponents - R.8 Assess Your Understanding - Page 78: 4

cube root

$\sqrt[n]{a}$ is a radical, and we read "the nth root of a" The second and third roots have special names, the square root and the cube root. All others are 4th, 5th, etc. roots of a number. We call $\sqrt[3]{a}$ the cube root of a.