What does "nimber" mean?

Any of a set of number-like objects used in combinatorial game theory, equivalent to the values of heaps in the game of nim.

What is a synonym for "nimber"?

Common synonyms include: grundy.

/ˈnɪm.bə/ noun

noun ·Rare ·Advanced level

Noun

1
Any of a set of number-like objects used in combinatorial game theory, equivalent to the values of heaps in the game of nim.

Blend of nim + number.