In a very small or minute manner; with extreme smallness or attention to tiny details.
From 'diminute' (from Latin diminutus) plus the adverbial suffix '-ly.' The adverbial form emphasizes the manner in which something is done with smallness or precision.
To examine something 'diminutely' means to look at the tiny particulars—it's the word Darwin would use for studying how finch beaks differ diminutely from island to island!
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