noun / adjective
numeral
NOO-mer-ul/ˈnuːmərəl/
A word or symbol representing a number.
Each carved numeral represents a number on the plain table.

Etymology
The pieces give “belonging to a number.” As a noun, numeral first named a word expressing a number, then extended to a figure or character standing for one.
In context
for kyanite all of the aluminum is in six fold coordinations we could write aluminum with a roman numeral six above it
More examples
- The word "seven" and the symbol "7" are both numerals.
- She writes the numeral 4 beside the correct answer.
- Different numeral systems can represent the same number.
Forms
numeral · numerals
numerical adjective — Relating to or expressed in numbers.