quern Riddle-Arnold Smith-Hall QUERN mola versatilis or trusatilis. quern: a hand-mill: mŏla trūsātĭlis, Cat. R. R. 10, 4: Gell. 3, 3: mola versātĭlis, Plin. 36, 18, 29, § 135: or (simply) mola, f.