What is Needle ?
Needle is (noun) 1. a metal tool for sewing, like a long pin, with a hole at one end for the thread to go through This needle hasn’t got a very sharp point. You must try to put the piece of wool through the hole in the needle. it’s like looking for a needle in a haystack it’s a hopeless task 2. a hand on a dial He looked at the dial and saw the needle was pointing to zero. 3. the thin leaf of a pine tree She had lots of pine needles stuck in her hair.
source: Easier English, Student Dictionary Upper Intermediate Level