
  linguistics (n.) 
  "the science of languages," 1847; see linguistic; also see -ics.


The scientific sense of linguist came long after the actual meanings of linguist. So linguist can be used for someone who studies/masters a language/languages.

There is also multilinguist who studies/uses several languages.


  Multilingualism is the act of using polyglotism, or using multiple languages, either by an individual speaker or by a community of speakers. Multilingual speakers outnumber monolingual speakers in the world's population.
  
  multilingual (adj.) 
      also multi-lingual, 1838, from multi- + Latin lingua "language," literally "tongue"


And lastly, there is polyglot who masters several languages. (though multilingualism can cover this also)


  Polyglotism or polyglottism is the ability to master numerous languages. Multilingualism is a word with a similar meaning.
  
  polyglot (adj.) 
      1650s, from Greek polyglottos "speaking many languages," literally "many-tongued," from polys "many" (see poly-) + glotta, Attic variant of glossa "language," literally "tongue" (see gloss (n.2)). As a noun from 1640s.


Which is the older sense of the word "linguist"?
Is there a way to cause google-chrome to quit, from the terminal, besides using killall google-chrome? 
I would like to be able to close it from a script without killing it.
