Definition of aponeurosis in English:

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Pronunciation: /ˌapən(y)o͝oˈrōsəs/

noun (plural aponeuroses /-ˌsēz/)

A sheet of pearly-white fibrous tissue that takes the place of a tendon in sheetlike muscles having a wide area of attachment.
Example sentences
  • The superficial branch, which forms the superficial palmer arch, descends a short distance into the palm and curves toward the thumb between the palmer aponeurosis and flexor tendons to form an arch.
  • The transection of the flexor tendons and the aponeurosis was an unavoidable consequence of these limitations and was standardized in all specimens.
  • The tendon of plantaris is still located between the aponeuroses of soleus and gastrocnemius.



Pronunciation: /-ˈrätik/
Example sentences
  • The ulnar or deep head (accessory head) arises by an aponeurotic band from the medial border of the coronoid process of the ulna, medial to the tendon of the brachialis muscle.
  • The fibular origin of the flexor digitorum longus muscle was resilient, with its tough aponeurotic fibers requiring incision to access the tibialis posterior muscle.
  • The calcifying aponeurotic fibroma7 has a predilection for the distal extremities; the cartilaginous component is microscopic and embedded within a fibromatosis-like background.


Late 17th century: modern Latin, from Greek aponeurōsis, from apo 'off, away' + neuron 'sinew' + -osis.

For editors and proofreaders

Syllabification: ap·o·neu·ro·sis

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