The word 'rat' is correct and usable in written English. You can use it when referring to a particular kind of small mammal. For example, "The rat scurried across the floor.".
After finding "fibres" on my own hand, I'm fairly satisfied morgellons is some 21st-century genre of OCD spread through the internet and the fibres are – as Wymore's labs report – particles of everyday, miscellaneous stuff: cotton, human hair, rat hair and so on.
And a rat, scurrying across the back of the room halfway through the 19-minute video (at about 9mins 55secs).
Articles on the New York Times from 24 March and 21 June 2013, gave further details and an article in the London Review of Books from 14 April 12014, implicated MI6 in a "rat line" for the transfer of arms from Libya.
Of course, lying on a beach or in a hammock has always offered something of a respite from the rat race.
More recently, place cells have also been found to code "time", clocking how many seconds a rat has been running on a wheel.
It requires the kind of "rat-like cunning" that Nicholas Tomalin reckoned was one of the three essential qualities for any good journalist.
But I live out of choice on a metropolitan rat-run, and am existing for two months in a haze of MDF dust while an extension is being built.
Awesome tool! I started using it one year ago and I never had to look for another app
Ha Thuy Vy
MA of Applied Linguistic, Maquarie University, Australia