JARGONIC
Jar*gon"ic, a.
Defn: Of or pertaining to the mineral jargon.
JARGONIST
Jar"gon*ist, n.
Defn: One addicted to jargon; one who uses cant or slang. Macaulay.
JARL
Jarl, n. Etym: [Icel., nobleman, chief. See Earl.]
Defn: A chief; an earl; in English history, one of the leaders in the
Danish and Norse invasions. Longfellow.
JARNUT
Jar"nut`, n. Etym: [Of Scand. origin: cf. Dan. jordnöd.] (Bot.)
Defn: An earthnut. Dr. Prior.
JAROSITE
Ja*ro"site, n. Etym: [From Barranco Jaroso, in Spain.] (Min.)
Defn: An ocher-yellow mineral occurring on minute rhombohedral crystals. It is a hydrous sulphate of iron and potash.