number cruncher

Definitions of number cruncher
1

n a computer capable of performing a large number of mathematical operations per second

Type of:
computer, computing device, computing machine, data processor, electronic computer, information processing system
a machine for performing calculations automatically

n someone able to perform complex and lengthy calculations

Type of:
calculator, computer, estimator, figurer, reckoner
an expert at calculation (or at operating calculating machines)

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