[It., dim. of prec.] A smaller opening on either side of the ‘bocca’ in a glass-furnace.
1799. G. Smith, Laborat., I. 167. On each side of the bocca, is a smaller hole, or boccarella.
1832. G. Porter, Porcelain, 158. Sometimes called a boccarella, but more generally by the familiar name of nose-hole.
