The Collaborative International Dictionary of English v.0.48:

hairlike \hairlike\ adj.
   1. shaped like a hair; long and slender.

   Syn: capillary.
        [PJC]

   2. long and slender with a very fine internal diameter.

   Syn: capillary.
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

hairlike
    adj 1: long and slender with a very small internal diameter; "a
           capillary tube" [syn: capillary, hairlike]

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "hairlike":
   bristlelike, capillary, cirrose, cirrous, fibered, fibroid,
   fibrous, flagelliform, flossy, funicular, gossamery, hairy,
   ligamental, ropy, silky, stringy, taeniate, taeniform, threadlike,
   thready, wiry