blue John (suomeksi)

Määritelmät:

(lb, en, obsolete, brewing) afterwort, Afterwort, partially fermented wort. (defdate, 17th-19th c.)
A semiprecious mineral mined in Derbyshire, a form of fluorite with bands of a purple-blue or yellowish colour. (defdate, from 18th c.)
(lb, en, US, _, regional) skimmed milk, Skimmed milk. (defdate, from 19th c.)