脊せき髄ずい性せい筋きん萎い縮しゅく症しょうMeaningsNoun1. spinal muscular atrophy; SMAKanji used脊backbone髄marrow性nature (of a person)筋muscle萎wither縮shrink症medical conditionComposed of脊せき髄ずいspinal cordNoun性せいnature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); -ty; -ity; -ness; -cyNoun筋きんmuscleNoun萎い縮しゅくwithering; shrivelling; shrinking; contraction; atrophyNoun症しょうillness; condition; -pathySuffix