Metrology

n. science of measures and weights

Metrology (from Greek 'metron' (measure), and 'logos' (study of)) is the science of measurement. Metrology includes all theoretical and practical aspects of measurement.
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Noun
1. the scientific study of measurement
(hypernym) science, scientific discipline

(n.)
The science of, or a system of, weights and measures; also, a treatise on the subject.
  

Metrology One key of the ancient symbol-language, which concealed and revealed certain aspects of the esoteric teachings. It is seen in Hebrew metrology and its connection with the numerical values of the Hebrew letters, some clues to which were discovered by Ralston Skinner, author of The Source of Measures. A measure, apart from number, reduces itself to a unit of measurement. It is hard to imagine how such a unit could be conceived, defined, or preserved, apart from physical objects; so that it would not be very surprising to find that such units have been preserved in ancient masonry. A number of well-defined units, generally called cubits, have thus been found.
If metrology is taken to include ratios, pi, the golden section, and other such constants may be sought among the proportions of ancient architecture. Clearly if we know the unit used, the length or other dimensions of a building will give us a number; and so those who knew the units would have the clue to the secret numbers.