Boissa (f)
(with) definite article: lasocket for the insertion of one or more pipes
According to Rossèl, "the stock of the Graile" only; NB: Compare, however, the plural form ("(las) bouissos") of the synonym (➺ the link below), as mentioned by Alexandre!
Rossèl, Sèrgi: Es polida la mieuna Cabra (My goat is beautiful). In: Utriculus 3;3 (11), luglio-settembre 1994, p.35.