ˈslide rule BrE AmE noun [countable]
an old-fashioned instrument used for calculating numbers, that looks like a ruler and has a middle part that slides across
ˈslide rule BrE AmE noun [countable]
an old-fashioned instrument used for calculating numbers, that looks like a ruler and has a middle part that slides across
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012