American Dictionary of the English Language

J'ARGON, noun

1. Confused, unintelligible talk or language; gabble; gibberish; cant.

All jargon of the schools.

2. A mineral, usually of a gray or greenish white color, in small irregular grains, or crystallized in quadrangular prisms surmounted with pyramids, or in octahedrons consisting of double quadrangular prisms. [See Zircon.]