fine-toothed comb

English Thesaurus

1. a method of examining in minute detail (noun.act)

hypernym	:	examination, scrutiny,
definition	:	the act of examining something closely (as for mistakes) (noun.act)

2. a comb with teeth set close together (noun.artifact)

hypernym	:	comb,
definition	:	a flat device with narrow pointed teeth on one edge; disentangles or arranges hair (noun.artifact)