letter-and-number
nounUK /ˈlet.ər.əndˌnʌm.bər/
US /ˈlet̬.ɚ.əndˌnʌm.bɚ/
A letter or a number that you can see and read.
Please write your name using each letter-and-number neatly.
OTHER MEANINGS
2. A mix of letters and numbers used to make a code.
The lock needs a letter-and-number code to open.
3. A single written mark that stands for a sound or an amount.
Each letter-and-number on the sign has a meaning.
4. Something made of both letters and numbers together.
Her password is a letter-and-number combination.