Baretti: A dictionary of the English and Italian languages
Schiúma, s. f.
1. froth, foam, scum. Venir la — alla bocca, to fret and fume. — di metalli,dross; 2. slaver, drivel; 3. foam of the sea;4. dregs, impurities. La — del popolo, the dregs of the people, the mob. — degli sciagurati,the most unfortunate of men.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English