D defs.my
Entry 4 senses Webster, 1913

Treacle

/(trē"k'l)/ · Trea·cle · IPA /ˈtɹiː.kəl/
01 n. A remedy against poison. See Theriac, 1.
  1. 1.
    A remedy against poison. See Theriac, 1.(Old Med.) See: Theriac
    “We kill the viper, and make treacle of him.” Jer. Taylor.
  2. 2.
    A sovereign remedy; a cure.[Obs.]
    “Christ which is to every harm treacle.” Chaucer.
  3. 3.
    Molasses; sometimes, specifically, the molasses which drains from the sugar-refining molds, and which is also called sugarhouse molasses. Also: sugarhouse molasses
  4. 4.
    A saccharine fluid, consisting of the inspissated juices or decoctions of certain vegetables, as the sap of the birch, sycamore, and the like.
Phrases & compounds
Treacle mustard — a name given to several species of the cruciferous genus Erysimum, especially the Erysimum cheiranthoides, which was formerly used as an ingredient in Venice treacle, or theriac.
Treacle water — a compound cordial prepared in different ways from a variety of ingredients, as hartshorn, roots of various plants, flowers, juices of plants, wines, etc., distilled or digested with Venice treacle. It was formerly regarded as a medicine of great virtue.
Venice treacle — Same as Theriac, 1.