significant digitsThe digits that define a numerical value. The significant digits of a given number begin with the first non-zero integer digit or, if this number is less than unity, with the first, zero or non-zero, decimal digit. They end with the final, zero or non-zero, decimal digit; the final zero or zeros of an integer may or may not be significant. Related category APPROXIMATIONS AND AVERAGESAlso on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History |