setnumber
nounUK /ˈsɛtˌnʌmbə/
US /ˈsɛtˌnʌmbər/
A set number is a fixed amount that does not change.
Each box has a set number of crayons, so you always get the same amount.
RELATED WORDS
OTHER MEANINGS
2. A number assigned to a particular set, such as a collection or group.
The museum labeled each display with a set number so visitors could find it.
3. In mathematics, a number that belongs to a given set of numbers.
Three is a set number in the group of odd numbers.
4. A number used to identify a matching group of items, like a set in a series.
The trading cards all share the same set number on the back.