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oro- +‎ -ad


orad (comparative more orad, superlative most orad)

  1. (anatomy) Located towards the oral opening (the mouth).
    • 1931, William Arthur Parks, Collected Papers, Volume 3, page 86,
      The sutures of four septa are exposed; the most orad of these can be traced with a fair degree of accuracy throughout almost its entire course.
    • 2001, Leonard R. Johnson, Gastrointestinal Physiology, page 63,
      The frequency of segmenting contractions is higher in the descending and sigmoid colon than in more orad areas.
    • 2006, Sara J. Busch, Small Animal Surgical Nursing: Skills and Concepts, page 270,
      The endoscope is advanced to its most orad (toward the mouth) limit and then slowly withdrawn so that the mucosa can be thoroughly examined.


  • (located toward the mouth): aboral

Coordinate terms[edit]



  1. (anatomy) Towards the oral opening (the mouth).
    • 1998, Tadataka Yamada, et al., Handbook of Gastroenterology, page 228,
      The most common symptom of GERD is heartburn, which is described as substernal burning that moves orad from the xiphoid.
    • 1999, D. Michael Denbow, 12: Gastrointestinal Anatomy and Physiology, G. Causey Whittow (editor), Sturkie's Avian Physiology, page 307,
      Beginning 8 to 10 sec prior to egestion, the pellet is moved orad by esophageal antiperistalsis.
    • 2012, Neeraj Sharma, Janice Freeman, 8: Esophageal Manometry, Joel E. Richter, Donald O. Castell (editors), The Esophagus, page 179,
      This is due to the UES moving completely off the sensor as it moves orad with the swallow.






  1. (Spain) Informal second-person plural (vosotros or vosotras) affirmative imperative form of orar.