2. Initialism. (abbreviation of well-formed formula) ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Wff
WD WD-40 WDC WDHA syndrome WDLL WDM WDS WEE WEEVAC-6 WEEVAC-6s | WEE virus WEIRD WEP WER WFC WFF WFL WGA WGARA WGD | WGWAG WHIM WHINSEC WHO WI WI-38 cells WIA WIBNI WIC WIG |