spinal muscular atrophyWiktionary 原文释义（英文）名词 NounA neuromuscular disorder that results in the loss of motor neurons and progressive muscle wasting.词族派生词（7）SMAspinal muscular atrophiesspinal muscular atrophy, type 0spinal muscular atrophy, type 1spinal muscular atrophy, type 2spinal muscular atrophy, type 3spinal muscular atrophy, type 4相关词（1）spinal muscular atrophies