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We found 8 dictionaries with English definitions that include the word blue-john: Click on the first link on a line below to go directly to a page where "blue-john" is defined. General (8 matching dictionaries) blue-john: Wordnik [home, info] Blue-john: Dictionary.com [home, info] Blue-john: Online Plain Text English Dictionary [home, info] blue-john: Webster's Revised Unabridged, 1913 Edition [home, info] Blue-john: AllWords.com Multi-Lingual Dictionary [home, info] blue-john: Webster's 1828 Dictionary [home, info] blue-john: Free Dictionary [home, info] Blue-john: Dictionary/thesaurus [home, info]

Quick definitions (blue-john) (n.) A name given to fluor spar in Derbyshire, where it is used for ornamental purposes. (This definition is from the 1913 Webster's Dictionary and may be outdated.)