• Clear fluid that fills the front part of the eye.
  Harvard Dictionary of Health Terms
  Harvard Medical Publishing, 2011
• The clear, watery fluid which fills the anterior and posterior chambers of the eye. It has a refractive index lower than the crystalline lens, which it surrounds, and is involved in the metabolism of the cornea and the crystalline lens. (Cline et al., Dictionary of Visual Science, 4th ed, p319)
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• The watery fluid which is present in the anterior and posterior chambers of the eye.
  NCI
  U.S. National Cancer Institute, 2021
• (portion of aqueous humor) Body substance in liquid state contained in the anterior and posterior chambers of the eyeball.
  Foundational Model of Anatomy
  University of Washington, 2017
• Aqueous humour, optically clear, slightly alkaline liquid that occupies the anterior and posterior chambers of the eye (the space in front of the iris and lens and the ringlike space encircling the lens). The aqueous humour resembles blood plasma in composition but contains less protein and glucose...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2025