1. (n.) pl. of Pleuron.

2. (n. fem.) The smooth serous membrane which closely covers the lungs and the adjacent surfaces of the thorax; the pleural membrane.

3. (n. fem.) The closed sac formed by the pleural membrane about each lung, or the fold of membrane connecting each lung with the body wall.

4. (n. fem.) Same as Pleuron.

5. (n.) Plural of Pleuron

allantoic membrane amnion amniotic sac arachnoid membrane basement membrane conjuctiva eardrum hymen maidenhead membrana serosa membrana tympana membrane meninges meninx neurilemma pellicle pericardium perineurium serosa tympanic membrane tympanum velum