Meaning of BOLAS in English
[ 'bəʊləs ]
■ noun [treated as sing. or plural ] (especially in South America) a missile consisting of a number of balls connected by strong cord, thrown to entangle the limbs of cattle or other animals.
C19: from Sp. and Port., plural of bola 'ball'.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004