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media pl of MEDIUM
me·dia 'mēd-ē-ə n, pl me·di·ae -ē-.ē the middle coat of the wall of a blood or lymph vessel consisting chiefly of circular muscle fibers called also tunica media
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n.
1. the middle layer of the wall of a vein or artery. It is the thickest of the three layers, being composed of elastic fibres and smooth muscle fibres in alternating layers.
2. the middle layer of various other organs or parts.
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me·dia (meґde-ə) [L.] 1. plural of medium. 2. middle. 3. tunica media vasorum.Medical dictionary. 2011.