"Jargon" would be language that's particular to a given trade or profession; lawyers ( pro per, dicta, pro tem,) doctors (STAT, "bag him" , "get her vitals",) along with the specific words used for...
The Train
I like to see it lap the miles,
And lick the valleys up,
And stop to feed itself at tanks;
And then, prodigious, step
Around a pile of mountains,
And, supercilious, peer
In shanties...