psychrotroph

psychrotroph A microorganism that can grow at low temperatures but grows optimally between 15 degrees and 20 degrees Celsius. Related cold, frost; freezing units of words: algid-; cheimo-, chimo-; crymo-, krymo-; cryo-, kryo-; frigo-; gel-; pago-; rhigo-.
Found on http://www.wordinfo.info/words/index/info/view_unit/1777/2

Psychrotroph

A microorganism growing at lower than the usual temperature (> 20 C)
Found on http://www.dyerlabs.com/glossary/microbiology/2w-x-y-z.html
No exact match found