haystack

Etymology

From Middle English haystak, haystake, hey stak, equivalent to hay +‎ stack.

Pronunciation

• IPA^(key): /ˈheɪˌstæk/

• Audio (US)

  (file)

Noun

haystack (plural haystacks)

1. A mound, pile, or stack of stored hay.
2. (canoeing) A standing wave in a rapid.
3. (programming, PHP) The text string within which another string is searched for.
   • 2010, Peter MacIntyre, PHP: The Good Parts, page 39:

     Both of these functions will look through the haystack for the specified needle and, if they find it, will return the portion of the string from the beginning of the needle to the end of the haystack.