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rugose
Ruhr
ruin
ruination
ruinous
rule
rule of 72
rule of scarcity
rule of thumb
rule out
rulebook
rulebook slowdown
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rule of thumb

rule of thumb


noun 
Definition:
 
1. common practice: a way of proceeding based on experience or sound judgment

2. generally reliable method: any practical, though not entirely accurate, method that can be relied on for an acceptable result

[Probably < the practice of using the thumb as a rough measure]

rule-of-thumb adjective
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