bollock
bol·lock
noun
1.
2.
a pulley-block at the head of a topmast
Origin
From Middle English ballok, from Old English bealluc (“testicle”, literally “little ball”). By surface analysis, ball + -ock.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.