auxiliary boiler auxiliary airfield • auxiliary cell · · · Info · Definitions · Synonyms · Characters · · auxiliary boiler · · Text Common · · Latin · · Scripts 16 · · Length 8 · · Syllables Definitions · · · (noun) (nautical) an extra boiler (as a ship's boiler that is used while the ship is in port). Synonyms: auxiliary boiler, donkey boiler. · · Noun Definition 1 Synonyms · · · donkey boiler · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072 u latin small letter u U+0075 x latin small letter x U+0078 y latin small letter y U+0079