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• Rule of thumb — Rule Rule, n. [OE. reule, riule, OF. riule, reule, F. r[ e]gle, fr. L. regula a ruler, rule, model, fr. regere, rectum, to lead straight, to direct. See {Right}, a., and cf. {Regular}.] 1. That which is prescribed or laid down as a guide for… …   The Collaborative International Dictionary of English

• rule o' thumb — rule of thumb or rule o thumb, 1. a rule based on experience or practice rather than on scientific knowledge: »The practical men believed that the idol whom they worship rule of thumb has been the source of the past prosperity, and will suffice… …   Useful english dictionary

• rule of thumb —    Rule of thumb means approximately.   (Dorking School Dictionary)    ***    A rule of thumb is a general rule which is a handy way of measuring or calculating something.     As a rule of thumb, use one third vinegar and three thirds oil to make …   English Idioms & idiomatic expressions

• rule of thumb — ► a practical and approximate way of measuring or deciding about something: »As a rule of thumb, the higher the yield offered, the riskier the investments will be. Main Entry: ↑rule …   Financial and business terms

• rule-of-thumb — rule of thumbˈ adjective According to rule of thumb (see below) • • • Main Entry: ↑rule …   Useful english dictionary

• rule of thumb — means approximately …   The small dictionary of idiomes

• rule of thumb — n. [from the method of measuring by the thumb] 1. a rule based on experience or practice rather than on scientific knowledge 2. any method of estimating that is practical though not precise …   English World dictionary

• rule of thumb — rule′ of thumb′ n. 1) a general principle or rule based on experience or practice, as opposed to a scientific calculation 2) a rough, practical method of procedure • Etymology: 1685–95 …   From formal English to slang

• rule of thumb — ► rule of thumb a broadly accurate guide or principle, based on practice rather than theory. Main Entry: ↑rule …   English terms dictionary

• Rule of thumb —   Rule of thumb means approximately …   Dictionary of English idioms