Main Entry:

pleu·ra

Pronunciation:

\ˈplu̇r-ə\

Function:

noun

Inflected Form(s):

plural pleu·rae \ˈplu̇r-ˌē, -ˌī\ or pleuras

Etymology:

Middle English, from Medieval Latin, from Greek, rib, side

Date:

15th century

: the delicate serous membrane that lines each half of the thorax of mammals and is folded back over the surface of the lung of the same side

— pleu·ral \ˈplu̇r-əl\ adjective