duramen duramatral • durance · · · Info · Definitions · Synonyms · Characters · · duramen · · Text Latin · · Script 7 · · Length Definitions · · · (noun) the older inactive central wood of a tree or woody plant; usually darker and denser than the surrounding sapwood. Synonyms: heartwood. · · Noun Definition 1 Synonyms · · · heartwood · · Synonym 1 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 u latin small letter u U+0075