aponeurosis

n. membrane formed by the expansion of a tendon

Aponeuroses (απο, "away" or "of", and νευρον, "sinew") are membranes separating muscles from each other. They have a shiny, whitish-silvery color, and are histologically similar to tendons, but are very sparingly supplied with blood vessels and nerves. When dissected, aponeuroses are papery, and peel off by sections. The primary regions with thick aponeurosis is in the ventral abdominal region, the dorsal lumbar region, and in the palmar region.
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Aponeurosis /ap·o·neu·ro·sis/ pl. aponeuro´ses [Gr.] a sheetlike tendinous expansion, mainly serving to connect a muscle with the parts it moves. [more]Aponeurosis - Community and Resources

Noun
1. any of the deeper and thicker fascia that attach muscles to bones; resemble flattened tendons
(hypernym) fascia, facia

n. aponeurosis, membrane formed by the expansion of a tendon