• WordNet 3.6
    • adj duodecimal based on twelve "the duodecimal number system"
    • n duodecimal one part in twelve equal parts
    • ***
Webster's Revised Unabridged Dictionary
    • Duodecimal (Arch) A system of numbers, whose denominations rise in a scale of twelves, as of feet and inches. The system is used chiefly by artificers in computing the superficial and solid contents of their work.
    • Duodecimal A twelfth part; as, the duodecimals of an inch.
    • a Duodecimal Proceeding in computation by twelves; expressed in the scale of twelves.
    • ***
Century Dictionary and Cyclopedia
    • duodecimal Reckoning by twelves and powers of twelve: as, duodecimal multiplication.
    • n duodecimal One of a system of numerals the base of which is twelve.
    • n duodecimal plural An arithmetical rule for ascertaining the number of square feet, twelfths of feet, and square inches in a rectangular area or surface whose sides are given in feet and inches and twelfths of inches. The feet of the multiplier are first multiplied into the feet, inches, and twelfths of the multiplicand, giving square feet, twelfths, and inches. The inches of the multiplier are then multiplied into the feet and inches of the multiplicand, giving twelfths of feet and square inches, and finally the twelfths of inches of the multiplier are multiplied into the feet of the multiplicand, giving square inches. These three partial products are then added together to get the product sought. It is used by artificers. Also called duodecimal or cross multiplication.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Duodecimal dū-o-des′i-mal computed by twelves: twelfth:
    • n Duodecimal a book of such sheets—usually written 12mo
    • adj Duodecimal dū-o-des′i-mal (pl.) a method of calculating the area of a rectangle when the length and breadth are stated in feet and inches
    • ***


Webster's Revised Unabridged Dictionary
L. duodecim, twelve. See Dozen
Chambers's Twentieth Century Dictionary
L. duodecim, twelve—duo, two, and decem, ten.


In literature:

They learned to use both the decimal and the duodecimal systems (nowadays we use only the decimal system, which is a great pity).
"Ancient Man" by Hendrik Willem van Loon
Three quarters of the Forms bear a duodecimal impress.
"Inquiries into Human Faculty and Its Development" by Francis Galton
Associated Words: dodecagon, dodecahedral, dodecahedron, duodecimal, duodecimfid, duodecimo, duodecuple, duodenary.
"Putnam's Word Book" by Louis A. Flemming
Two possible number systems that have, for purely theoretical reasons, attracted much attention, are the octonary and the duodecimal systems.
"The Number Concept" by Levi Leonard Conant
Elongati sunt enim pilarii novi longitudine pedum fere duodecim.
"The Principles of Gothic Ecclesiastical Architecture, Elucidated by Question and Answer, 4th ed." by Matthew Holbeche Bloxam
Then came "the month of roses," as the Persians appropriately style that duodecimal portion of the year.
"She and I, Volume 1" by John Conroy Hutcheson
Duodecim minores glosati Prophetae in uno volumine.
"Bibliomania in the Middle Ages" by Frederick Somner Merryweather
Duodecimal scale, II, 68.
"A Budget of Paradoxes, Volume II (of II)" by Augustus de Morgan
A little duodecimal of fairy love divides the desires of your heart and draws one wing down.
"The Jessica Letters: An Editor's Romance" by Paul Elmer More
Rolpho domi ipse reses pugilos suos duodecim Adilso in subsidium mittit, quorum etiam opera is alioqui vincendus, victoriam obtinuit.
"Beowulf" by R. W. Chambers
DUODECIMAL SYSTEM, in numeration, a system of numbers the scale of which is twelve.
"The New Gresham Encyclopedia" by Various
Their measures were also duodecimal.
"The History of Antiquity, Vol. I (of VI)" by Max Duncker
Parturitio aliquando decem vel duodecim annos post ultimos menses evenit.
"Essays In Pastoral Medicine" by Austin ÓMalley
Cauda plerumque aequalis, rectricibus duodecim.
"Zoological Illustrations, Volume I" by William Swainson
The sum of his life seemed to be made up of duodecimal fractions.
"A Sovereign Remedy" by Flora Annie Steel

In poetry:

Beware the Sissy Boy my child,
Not because he's very wild;
The Sissy Boy is never that,
Although he'll run if you say "Scat!"
The Sissy Boy's infinitesimal,
He is not worth a duodecimal.
"The Sissy Boy" by Edwin Carty Ranck

In science:

Sylvester, Tables of the generating functions and groundforms of the binary duodecimic, with some general remarks, and tables of the irreducible syzigies of certain quantics.
Bivariate Poincare series for the algebra of covariants of a binary form