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The Britannica Dictionary
slide rule
1 ENTRIES FOUND:
slide rule
(noun)
slide rule
noun
plural
slide rules
slide rule
noun
plural
slide rules
Britannica Dictionary definition of SLIDE RULE
[
count
]
:
an old-fashioned instrument that is like a ruler with a middle piece that slides back and forth and that is used to do calculations
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protocol
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a system of rules that explain the correct conduct and procedures to follow in formal situations
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