a hairless and indurated area or gall on the side of a horse, caused by the irritation of a spur.


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  • Spurge

    noun 1. any of numerous plants of the genus Euphorbia, having a milky juice and flowers with no petals or sepals. noun 1. any of various euphorbiaceous plants of the genus Euphorbia that have milky sap and small flowers typically surrounded by conspicuous bracts. Some species have purgative properties

  • Spur-gear

    noun, Machinery. 1. a gear having straight teeth cut on the rim parallel to the axis of rotation. noun 1. a gear having involuted teeth either straight or helically cut on a cylindrical surface. Two such gears are used to transmit power between parallel shafts

  • Spur-gearing

    noun 1. a system of spur gears. 2. any system of gears with parallel axes of rotation.

  • Spurge-family

    noun 1. the large plant family Euphorbiaceae, characterized by herbaceous plants, shrubs, and trees having milky juice, simple alternate leaves or no leaves, usually petalless flowers often with showy bracts, and capsular fruit, and including cassava, croton, crown-of-thorns, poinsettia, snow-on-the-mountain, spurge, and the plants that produce castor oil, rubber, and tung oil.
