1) Acid-loving 2) Acidophilous 3) Aciduric 4) Eosinophilic 5) Especially of some bacteria 
Having an affinity for acid dyes; denoting a cell or tissue element that stains with an acid dye, such as eosin. ... Synonym: acidophil, acidophile, oxychromatic. ... (05 Mar 2000) ... 
(as″ĭ-do-fil´ik) readily stained with acid dyes. growing in highly acid media; said of microorganisms.
Type: Term Pronunciation: as′i-dō-fil′ik, ă-sid′ō-fil-ik Definitions: 1. Having an affinity for acid dyes; denoting a cell or tissue element that stains with an acid dye, such as eosin. Synonyms: oxychromatic
[adj] - especially of some bacteria
acidophilic 1. A reference to organisms that thrive in an acidic environment. 2. A designation of a microorganism that grows well in a highly acid medium. 3. A description of any microorganism that can or must live in an acidic environment (pH below 6). 4. Referring to anything that is easily stained with acid dye.
acidophilous adjective especially of some bacteria; growing well in an acid medium
having an affinity for acid stains; eosinophilic. · thriving in or requiring an acid environment.