In the expression 4² = 16, the number '4' is called the _____ of 16. Power Engineering In the expression 4² = 16, the number '4' is called the _____ of 16. A. Square root. B. Cube root. C. Square. D. Cube. E. Multiplicand. Answer: A Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+