[hwahyt-ey-ker, wahyt-]
noun (often initial capital letter)
  1. an arbitrary name for a piece of land used for purposes of supposition in legal argument or the like (often distinguished from blackacre).

Origin of whiteacre

First recorded in 1635–45; white + acre
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018