blue john

noun

1
: a fibrous or columnar variety of fluorite found in Derbyshire, England and used especially for vases
2
sometimes capitalized J dialectal : skim milk
especially : milk that is just beginning to sour

Word History

Etymology

from the name John

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Dictionary Entries Near blue john

blue jet

blue john

bluejoint

See More Nearby Entries 

Cite this Entry

“Blue john.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blue%20john. Accessed 27 Nov. 2024.

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