amyotrophy Syllabification: (am·y·ot·ro·phy)Pronunciation: /ˌāmīˈätrəfē/Definition of amyotrophy noun Medicine muscular atrophy. Derivatives amyotrophicPronunciation: /ˌāmīəˈträfik, -əˈtrō-/ adjective Origin: late 19th century: from a-1 'not' + Greek mus, muo- 'muscle' + -trophy(see -trophic)amyotrophy in other Oxford dictionaries Definition of amyotrophy in the British & World English dictionary