microfoam/ˈmʌɪkɹə(ʊ)fəʊm/EtymologyFrom micro- + foam.nounFoam consisting of very small bubbles, specifically as an element in the steamed milk used to make certain types of latte coffee.“When a barista steams the milk for a cappuccino, microfoam is created by introducing very tiny bubbles of air into the milk, giving the milk a velvety texture and sweetness.”