Zapa (f)
(with) definite article: aplug, used to stop the upper end of a cane single reed base, if not closed by a natural node
From "tapa" [lid] ?; Plug in the top of the base of a heteroglot single reed.
Foxo, Xosé Lois: Os segredos da gaita [1982]. Ourense [Orense], s.a. [1985 (2)], p.32.
ws (linguistics [➺ Dictionaries, &c.])