Definition of "duodecimal" [du•o•dec•i•mal]

• Of, relating to, or based on the number 12: the duodecimal number system. (adjective)
• Of or relating to twelfths. (adjective)
• A twelfth. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Up and after ordering some things towards my wife's going into the country, to the office, where I spent the morning upon my measuring rules very pleasantly till noon, and then comes Creed and he and I talked about mathematiques, and he tells me of a way found out by Mr. Jonas Moore which he calls duodecimal arithmetique, which is properly applied to measuring, where all is ordered by inches, which are 12 in"
• "Up and after ordering some things towards my wife's going into the country, to the office, where I spent the morning upon my measuring rules very pleasantly till noon, and then comes Creed and he and I talked about mathematiques, and he tells me of a way found out by Mr. Jonas Moore which he calls duodecimal arithmetique, which is properly applied to measuring, where all is ordered by inches, which are 12 in a foot, which I have a mind to learn."
• "It later changed its name to the Dozenal Society of America, since the word “duodecimal” was deemed to be overly reminiscent of the system they were aiming to replace."