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“numeronym”
The name or names of a series of symbols of a fixed order which can be determined by calculating: Whenever Sarah tallies her mathematical solutions, she uses numeronyms; such as, "one" for 1, "two" for 2; "three" for 3; etc.
This entry is located in the following units:
numer-, number-
(page 4)
-onym, -onymy, -onymic, -onymically, -onymous, -onymously, -nym
(page 8)