Of a comb, brush, or similar implement, having small teeth placed close together.(adjective)
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Use "fine-toothed" in a sentence
""We have to go over that study with a fine-toothed comb.""
"Those nights I always took a bath and sometimes I got high and cleaned her little place with a fine-toothed comb."
"Since I like to argue about what Darwin said I have Origin … beside me here, have spent dozens of hours reading his correspondences and notes, and have been over, with a fine-toothed comb, most of Descent, for instance."