Uncertain. Possibly from the verb usca or alternatively from Latin sucus, contaminated with the former (see also suc, which may be a borrowed doublet). Another theory suggests an Ancient Greek root *οἴσυκος (*oísukos) < οἴσυπος (oísupos).
usuc n (plural usucuri)
- (rare, regional) sebum, an oily substance covering the wool sheared from a sheep, which is then washed off
- (rare, regional) the dirty water consisting of this washed out material