Webster
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Webster’s Revised Unabridged Dictionary · 1913

Numeration

Nu′mer·a′tion (·ā′shŭn), n. [L. numeratio a counting out: cf. F. numération.] 1. The act or art of numbering.

Numeration is but still the adding of one unit more, and giving to the whole a new name or sign. Locke.

2. The act or art of reading numbers when expressed by means of numerals. The term is almost exclusively applied to the art of reading numbers written in the scale of tens, by the Arabic method. Davies & Peck.

☞ For convenience in reading, numbers are usually separated by commas into periods of three figures each, as 1,155,465. According to what is called the "English" system, the billion is a million of millions, a trillion a million of billions, and each higher denomination is a million times the one preceding. According to the system of the French and other Continental nations and also that of the United States, the billion is a thousand millions, and each higher denomination is a thousand times the preceding.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty. Of the others, 1,362 (a word or a single letter each) were inferred by AI from the context by the dictionary’s own rules and are marked with a wavy underline (tap or point at one to see the note); the rest, which could not be inferred with confidence, are left as “?”.