Eragrostis tef, teff, Williams lovegrass, annual bunch grass, taf (Amharic: ጤፍ? ṭēff; Tigrinya: ጣፍ? ṭaff), or xaafii (Oromo), is an annual grass, a species of lovegrass native to Eritrea and Ethiopia. The word "teff" is connected by folk etymology to the Ethio-Semitic root "ṭff", which means "lost" (because of the small size of the grain).