eucalyptus regnans eucalyptus pauciflora • eucalyptus rostrata · · · Info · Definitions · Synonyms · Characters · · eucalyptus regnans · · Text Common · · Latin · · Scripts 18 · · Length 7 · · Syllables Definitions · · · (noun) tree having wood similar to the alpine ash; tallest tree in Australia and tallest hardwood in the world. Synonyms: mountain ash, Eucalyptus regnans. · · Noun Definition 1 Synonyms · · · mountain ash · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 g latin small letter g U+0067 l latin small letter l U+006C n latin small letter n U+006E p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079