jargon in WordNet English dictionary

1. a characteristic language of a particular group (as among thieves)
   "they don't speak our lingo"
   slang  cant  jargon  lingo  argot  patois  vernacular 
   
2. specialized technical terminology characteristic of a particular subject
   jargon 
   
3. a colorless (or pale yellow or smoky) variety of zircon
   jargoon  jargon