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Webster 1913 Edition
Polacca
Po-lac′ca
,Noun.
[It.
polacca
, polaccra
, polacra
; cf. F. polaque
, polacre
, Sp. polacre
,] [Written also
polacre
.] 1.
(Naut.)
A vessel with two or three masts, used in the Mediterranean. The masts are usually of one piece, and without tops, caps, or crosstrees.