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From Latin enatus (ēnātus) (from ēnāscor (spring forth)) + English +‎ -ion.


enation (plural enations)

  1. (botany) A small outgrowth on the surface of a plant organ.
    • 1977, Robert G. Milne, Osvaldo Lovisolo, Maize Rough Dwarf and Related Viruses, in Karl Maramonosch, Max A Lauffer (editors), Advances in Virus Research, Volume 21, page 282,
      In field infections, the enations are very small and appear as gray streaks on the backs of the leaves. However, conspicuous enations appear on plants inoculated and reared in the glasshouse (Lindsten, 1961a; Catherall, 1970).
    • 1993, Wilson Nichols Stewart, Gar W. Rothwell, Paleobotany and the Evolution of Plants, page 113,
      Irrespective of how the terminal position of sporangia on short lateral branches evolved, we should keep in mind that it was an important step in positioning the developing sporangia so that they could be protected by enations and microphylls.
    • 1996, M. Diekmann, C. A. J. Putter, Stone Fruits, page 20,
      Infected trees are stunted, with narrow leaves, often with large enations on their underside.
  2. (botany, uncountable) The generation of such an outgrowth.
    • 1965, Albert Julius Winkler, General Viticulture[1], page 416:
      Enation is characterized by the formation of very small, leaflike outgrowths — enations — from the lower surface of leaves, usually along the larger veins (fig. 116).
    • 1991, Chester N. Roistacher, Graft-Transmissible Diseases of Citrus: Handbook for Detection and Diagnosis[2], page 145:
      Wallace and Drake (1960, 1961) reported that the woody-gall problem found in Peru, South Africa and Australia was related to vein enation.
    • 2011, Linda Gilkeson, Backyard Bounty: The Complete Guide to Year-Round Organic Gardening in the Pacific Northwest[3], page 244:
      Choose varieties resistant to the pea enation virus for summer crops.


  • (small outgrowth on a plant): gall