The tiny details of anything can be called minutiae. Minutia — which you'll usually see as minutiae, the plural version — is a little like trivia.

Notice how minutia almost has the word mini in it? That's a good clue to the meaning, which is "small things or details." People who are sports fans tend to love minutiae — like what a player's batting average is, right down to the third decimal point. Anytime you're dealing with itty-bitty details, you're looking at minutiae.

Definitions of minutia

n a small or minor detail

“he had memorized the many minutiae of the legal code”
Type of:
detail, item, point
an isolated fact that is considered separately from the whole

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