needlestack means A stack of needles. Represents the task of finding one thing among a large number of very similar things.
Etymology
Blend of needle + haystack, from the metaphor of a needle in a haystack.
noun
- A stack of needles. Represents the task of finding one thing among a large number of very similar things.“Unless their flag of a flower is waving, finding such plants is like finding a needle in a needlestack.”