double-length number

double-length number

[¦dəb·əl ¦leŋkth ′nəm·bər]
(computer science)
A number having twice as many digits as are ordinarily used in a given computer. Also known as double-precision number.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.