ad hoc
is this word originally English ?
I mean word " ad hoc "
what we call this kind of wordsFor example

an ad hoc information need is a temporary information need

Question

ad hoc
is this word originally English ?
I mean word " ad hoc " 
what we call this kind of wordsFor example

an ad hoc information need is a temporary information need

Answer

It's Latin for "for this". You could call it a loan word, or were you looking for something more specific?