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The Collaborative International Dictionary
Aponeurosis

Aponeurosis \Ap`o*neu*ro"sis\, n.; pl. Aponeuroses. [Gr. ?, fr. ? to pass into a tendon; ? from + ? to strain the sinews, ? sinew, tendon, nerve.] (Anat.) Any one of the thicker and denser of the deep fasci[ae] which cover, invest, and the terminations and attachments of, many muscles. They often differ from tendons only in being flat and thin. See Fascia.

Douglas Harper's Etymology Dictionary
aponeurosis

1670s, from Latin, from Greek aponeurosis, from aponeuroein, from apo- "off, away from" (see apo-) + neuron "sinew" (see neuro-).

Wiktionary
aponeurosis

n. (context anatomy English) A flattened fibrous membrane, similar to a tendon, that binds muscles together or connects them to other body parts like skin or bone.

WordNet
aponeurosis
  1. n. any of the deeper and thicker fascia that attach muscles to bones; resemble flattened tendons

  2. [also: aponeuroses (pl)]

Wikipedia
Aponeurosis

Aponeuroses (plural of aponeurosis: απο, "away" or "of", and νευρον, "sinew", and pronounced ap·o·neu·ro·sis) are layers of flat broad tendons. They have a shiny, whitish-silvery color, are histologically similar to tendons, and 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 are in the ventral abdominal region, the dorsal lumbar region, the ventriculus in birds, and the palmar and plantar regions.

Their primary function is to join muscles and the body parts the muscles act upon, whether it be bone or muscle.

Usage examples of "aponeurosis".

With the tendons gleaming softly in their beds, I removed the last bits of the aponeurosis, sprayed the wound with a mixture of alcohol and distilled water for disinfection, and set about closing the incisions.

I brought you an example of the palmar aponeurosis and the contractions which so interested you and Dupuytren.

I took it in both of mine and pressed the gnarled fingers back, rubbing my thumb gently over the thickened palmar aponeurosis that was trapping the tendons.

I had the aponeurosis laid bare, and could clearly see the thickening.

With the tendons gleaming softly in their beds, I removed the last bits of the aponeurosis, sprayed the wound with a mixture of alcohol and distilled water for disinfection, and set about closing the incisions.

In fact he was quite pleased with it: one of the few female corpses he had seen with that curious quasi-calcification of the palmar aponeuroses - fresh, too - but since it was only the hands that interested him at the moment, would either of his colleagues choose to go snacks?