let‧ter‧head /ˈletəhed $ -ər-/ noun

1. [countable] the name and address that is printed at the top of a sheet of writing paper

2. [uncountable] American English paper that has the name and address of a person or business printed at the top of it:
The letter had been written on university letterhead.

[TahlilGaran] Dictionary of Contemporary English ▲