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The Collaborative International Dictionary

Pleura \Pleu"ra\, n.; pl. L. Pleur[ae], E. Pleuras. [NL., n. fem., fr. Gr. ? a rib, the side.]

  1. (Anat.)

    1. The smooth serous membrane which closely covers the lungs and the adjacent surfaces of the thorax; the pleural membrane.

    2. The closed sac formed by the pleural membrane about each lung, or the fold of membrane connecting each lung with the body wall.

  2. (Zo["o]l.) Same as Pleuron.