1.NounA comb with finely spaced teeth, chiefly as a metaphorical means of making a thorough search.
"The police went through all his possessions with a toothcomb."
2.VerbTo use a toothcomb on (something).
3.VerbTo search (something) thoroughly.
"The flat was toothcombed for any trace of drugs."
4.NounA comb-like dental structure found in the lower jaws of certain primates consisting of long, flat front teeth with microscopic grooves, which are used for grooming fur.