Need word help

Is multicausal a word? As in "Disorder X, like many other psychological conditions, is now seen as multicausal,". It has many causes rather than one.

I already looked this up in a dictionary, but it sounds wrong when I read it to myself.
 
If you like, I can ask some of the Psychology faculty at the university. I can't see American and Canadian terminology differing that much, if at all.
 
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