binary decimal

plural binary decimals

1. datedA binary (base-2) numeral.

   Any positive integer up to 2ⁿ-1 inclusive can be expressed uniquely as a binary decimal of n figures, i.e., as a sum #92;sum#95;0#123;n-1#125;a#95;s2ˢ, where every a#95;s is 0 or 1.

   1938, G. H. Hardy, E. M. Wright, An Introduction to the Theory of Numbers, section 9.7

2. informalUsed other than figuratively or idiomatically: A decimal (numeral written as a concatenation of successive negative powers of the base) in base 2..