Lettic (not comparable)
- Of or pertaining to the Latvian people or the Latvian language.
- Of or pertaining to the Baltic family of languages.
1922, Melvil Dewey, Decimal classification and relative index for libraries and personal use:
- "491.8 Other Slavonic [...] .9 Lettic .91 Old Prussian .92 Lithuanian .93 Lettish (Livonian)"
Latvian — see Latvian