What does duodecimally mean?
Duodecimally means in twelfths or according to a system based on twelve equal parts. It is most often used in mathematical, metrological, and historical discussions of fractions, measurements, and number systems, where a quantity may be expressed duodecimally as one or more twelfths rather than in decimal tenths. The adverb can also refer more broadly to a twelve-part arrangement or scale. Its tone is formal and specialized, so it is uncommon in everyday speech, though its shorter relative duodecimal is more readily understood. The word is notable because twelve has repeatedly offered an alternative to decimal grouping: the familiar dozen and historically duodecimal weights and measures exploit the divisibility of twelve by two, three, and four. Knowing duodecimally therefore identifies not merely a number written with twelfths, but a deliberate organizing principle built around the number twelve.
adverbIn or by twelfths; using a system in which a unit is one twelfth of a whole.
- In or by twelfths, especially by expressing quantities as twelfths rather than decimal tenths.
"The instrument's scale is marked duodecimally, with twelfths rather than tenths."
"The measurement scale is graduated duodecimally, in units of one twelfth."
"The engineer compared the ratios duodecimally rather than as decimal fractions."
Twelve divides neatly by two, three, and four, which is why a duodecimal approach favors convenience over convention.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does duodecimally come from?
The adverb was formed in English by adding the suffix -ly to duodecimal. Duodecimal derives from Latin duodecimus, meaning “twelfth,” which was formed from duo, “two,” and decimus, “tenth.” Related English forms include duodecal and duodecillion, while dozen also comes through Old French from the same Latin numeral.
How duodecimally is actually used
Formal, specialized, and uncommon outside mathematics, metrology, and historical studies of weights, measures, and number systems.