Pronunciation: ˌ ā - ˌ m ī - ə - ' tr ō -fik-, - ' trä-
Function: noun
Etymology: 2 a- + my- + -trophic
Date: 1886
: a rare progressive degenerative fatal disease affecting the motor neurons, usually beginning in middle age, and characterized especially by increasing and spreading muscular weakness and atrophy ― abbreviation ALS ― called also Lou Gehrig's disease