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Longman Dictionary of Contemporary English
serial number
noun
EXAMPLES FROM OTHER ENTRIES
▪ The stolen weapon was identified by its serial number.
EXAMPLES FROM CORPUS
▪ In addition, an AR-IS semiautomatic rifle with an obliterated serial number was found abandoned on the riverbank.
▪ They arrested me for having a gun with an altered serial number on it.
▪ This is of course very easy since what the spreadsheet has stored in cells C and D is a time serial number.
▪ This register lists them by serial number, price, type of lathe, date sold and to whom.
▪ Training returns, ammo expenditure, equipment serial number, vehicle mileage - all have to be documented.
Wiktionary
serial number

n. a unique number, assigned to a particular unit of some product, to identify it

Usage examples of "serial number".

A few of the bills from the ransom money had begun turning up in and around New York City, but by the time anyone at a bank noted the serial number, there was no way to track who had passed the bill.

She was not sworn to tell them only her name, rank, and serial number.

Polk and Company, that publishes city directories--- they also put out a list current car registrations by make and consecutive serial number.

The foreman read Starling the vehicle serial number from his records.

I offered it as evidence to the sheriff as soon as I saw its serial number was on that list.

So, I took the newt's serial number off the check list, made out the re­.

Each bar is marked with a unique serial number and I copied down as many of those as I could see.

All that's coming out of the media is name, rank, and serial number.