Dictionary
signif'icant dig'its
Math.
all the nonzero digits of a number and the zeros that are included between them or that are final zeros and signify accuracy:
The significant digits of 0.01230 are 1, 2, 3, and the final 0, which signifies accuracy to five places. Also called
signif'icant fig'ures. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.