Definition of synarthrosis in English:

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Pronunciation: /ˌsɪnɑːˈθrəʊsɪs/

noun (plural synarthroses /ˌsɪnɑːˈθrəʊsiːz/)

An immovably fixed joint between bones connected by fibrous tissue (for example, the sutures of the skull).
Example sentences
  • Two adjacent ribs, often five and six, and six and seven, sometimes articulate at their costal cartilages by a diarthrosis, synarthrosis, or syndesmosis.
  • Examples of joints in the body that never move are the synarthroses in the skull.
  • An example of a synarthrosis is the suture in the skull between skull bones.


Late 16th century: from modern Latin, from Greek sunarthrōsis, from sun- 'together' + arthrōsis 'jointing' (from arthron 'joint').

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