blackstrap

noun

black·​strap ˈblak-ˌstrap 

1

: a common red wine of the Mediterranean

2

: a drink consisting of a mixture of rum and molasses

3

or blackstrap molasses

a

: the final molasses that is obtained in the last of successive processes of raw sugar manufacture and used as a constituent of many mixed cattle feeds and as a raw material for the production of industrial alcohol

b

: any thick and very dark molasses

4

: a dark heavy oil used especially for lubricating mine-car wheels

Word History

Etymology

black entry 1 + strap

First Known Use

1873, in the meaning defined at sense 3a

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