[rule of thumb] (1692) 1: a method of procedure based on experience and common sense
2: a general principle regarded as roughly correct but not intended to be scientifically accurate
[rule of thumb] (1692) 1: a method of procedure based on experience and common sense
2: a general principle regarded as roughly correct but not intended to be scientifically accurate
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012