Plural of atrophy; multiple instances of tissue wasting or degeneration.
From 'atrophy' (Greek 'a-' without + 'trophe' nourishment) with plural suffix. Can also be the third-person singular verb form of 'atrophy.'
When a word like 'atrophy' appears as a verb (the muscle 'atrophies' without use), we get this form—it's the same letters but pronounced slightly differently depending on whether it's a plural noun or a verb!
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