var. of UNDERBACK.
1764. Museum Rust., II. xcviii. 326. Large fats, or vats, (containing … wood ashes) with under-becks.
1828. Hull Rockingham, 14 June, 84/2. Three large guile tubs, several mash tubs and under becks.
1839. Hist. Chesterfield Antiq., 274. The instrument used in brewing, which is now called by some a betony, and by others an underbeck.
