- slide rule
**slide rules***N-COUNT*A**slide rule**is an instrument that you use for calculating numbers. It looks like a ruler and has a middle part that slides backwards and forwards.

*English dictionary.
2008.*

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**slide-rule**— also slide rule, calculating tool, 1838, from SLIDE (Cf. slide) (v.) + RULE (Cf. rule) (n.). So called for its method of operation … Etymology dictionary**Slide rule**— Slide Slide, n. [AS. sl[=i]de.] 1. The act of sliding; as, a slide on the ice. [1913 Webster] 2. Smooth, even passage or progress. [1913 Webster] A better slide into their business. Bacon. [1913 Webster] 3. That on which anything moves by sliding … The Collaborative International Dictionary of English**Slide rule**— n. a thin, flat calculating device consisting of a fixed outer piece and a movable middle piece. Both pieces are graduated in such a way (as, by a logarithmic scale) that multiplication, division, and other mathematical functions of an input var … The Collaborative International Dictionary of English**slide rule**— n an old fashioned instrument used for calculating numbers, that looks like a ruler and has a middle part that slides across … Dictionary of contemporary English**slide rule**— slide ,rule noun count a simple piece of equipment like a RULER with a piece in the middle that slides along, used for calculating … Usage of the words and phrases in modern English**slide rule**— slide′ rule n. math. a mechanical calculator consisting of a ruler with a sliding section, both bearing logarithmic scales • Etymology: 1875–80 … From formal English to slang**slide rule**— ► NOUN ▪ a ruler with a sliding central strip, marked with logarithmic scales and used for making rapid calculations … English terms dictionary**slide rule**— n. a mechanical mathematical device consisting of a ruler with a central sliding piece, both parts being marked with various number scales: used to find square roots, logarithms, quotients, etc. rapidly … English World dictionary**Slide rule**— For other uses, see Slide rule (disambiguation). A typical ten inch student slide rule (Pickett N902 T simplex trig). The slide rule, also known colloquially as a slipstick,[1] is a mechanical analog computer. The slide rule is used primarily for … Wikipedia**slide rule**— a device for performing mathematical calculations, consisting essentially of a ruler having a sliding piece moving along it, both marked with graduated, usually logarithmic, scales: now largely replaced by the electronic calculator. [1655 65 for… … Universalium