decussation decussately • decussis · · · Info · Definitions · Synonyms · Characters · · decussation · · Text Latin · · Script 11 · · Length Definitions · · · (noun) an intersection or crossing of two tracts in the form of the letter X. Synonyms: chiasma, chiasm. · · Noun Definition 1 Synonyms · · · chiasma · · Synonym 1 chiasm · · Synonym 2 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075