"bobtail" in the noun sense
1. bobtail, bob, dock
a short or shortened tail of certain animals
2. Old English sheepdog, bobtail
large sheepdog with a profuse shaggy bluish-grey-and-white coat and short tail believed to trace back to the Roman occupation of Britain
"bobtail" in the adjective sense
1. bobtail, bobtailed
having a short or shortened tail
"bobtail mare"
Source: WordNet® (An amazing lexical database of English)
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