Definition of pleuron in US English:


nounPlural pleura

  • The sidewall of each segment of the body of an arthropod.

    • ‘You can directly visualize the lung and the pleura along the chest wall.’
    • ‘Species identification was based on the morphologies of the rostrum and the 5th pleura.’
    • ‘There is a long, serrated rostrum and the abdomen bears pointed terminations on the pleura.’
    • ‘Using a small curved forceps, separate the tissue down to the pleura.’
    • ‘A broad, transverse, ventral ridge underlies the anterior part of the axial ring, and also the inner portion of the pleura.’


Early 18th century: from Greek, literally ‘side of the body, rib’.