Definition of protraction in English:

protraction

Line breaks: pro|trac¦tion
Pronunciation: /prəˈtrakʃ(ə)n
 
/

noun

[mass noun]
  • 1The action of prolonging something or the state of being prolonged: the protraction of the war
    More example sentences
    • Imagine them denuded of even the attenuated r and r release that they are allowed there; imagine their seemingly infinite protraction.
    • Such mathematical protraction excites the studious poker mind of the Wimbledon manager.
    • For breast cancer a loss of local control of 3% has been described for each day of protraction between external beam radiotherapy and brachytherapy boost.
  • 2The action of extending a part of the body.
    More example sentences
    • Another role of the scapula involves retraction and protraction along the thoracic wall.
    • Many adult frogs capture prey on land using a forward lunge of the entire body in combination with protraction of a short tongue that reaches only slightly beyond the margins of the jaws.
    • Muscles necessary for the rapid dorsoventral expansion of the head are composed primarily of fast-twitch fibers while those involved in more tonic contractions such as hyoid protraction have more slow-twitch muscle fibers.

Origin

mid 16th century: from French, or from late Latin protractio(n-), from protrahere 'prolong' (see protract).

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