Superlative form of minute: most minute. Smallest, littlest, tiniest.(adjective)
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Use "minutest" in a sentence
"At times he can bog you down with details, mainly because he explains them in minutest and seemingly most insignificant level (such as different seeds around the world)."
"The slow suicide of Anglicanism is displayed and described in minutest detail, and even those who want to preserve the Chuch, like the saintly Peter Akinola of Nigeria, are allowed to present their arguments in their own words."
"Clinton's selective memory about unflattering episodes in his life is indeed interesting, considering his ability to recall the minutest details of his childhood."