Online Google Dictionary

retract 中文解釋 wordnet sense Collocation Usage Collins Definition
Verb
/riˈtrakt/,
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retracted, past tense; retracts, 3rd person singular present; retracting, present participle; retracted, past participle;
  1. Draw or pull (something) back or back in
    • - she retracted her hand as if she'd been burned
  2. Withdraw (a statement or accusation) as untrue or unjustified
    • - he retracted his allegations
  3. Withdraw or go back on (an undertaking or promise)
    • - the parish council was forced to retract a previous resolution
  4. (of an animal) Draw (a part of itself) back into its body
    • - the cat retracted her claws
  5. Draw (the undercarriage or the wheels) up into the body of an aircraft

  6. Be drawn back into something
    • - the tentacle retracted quickly
  1. abjure: formally reject or disavow a formerly held belief, usually under pressure; "He retracted his earlier statements about his religion"; "She abjured her beliefs"
  2. shrink back: pull away from a source of disgust or fear
  3. use a surgical instrument to hold open (the edges of a wound or an organ)
  4. draw in: pull inward or towards a center; "The pilot drew in the landing gear"; "The cat retracted his claws"
  5. (retracted) drawn back and in; "a cat with retracted claws"
  6. (retraction) a disavowal or taking back of a previous assertion
  7. In topology, a retraction, as the name suggests, "retracts" an entire space into a subspace. A deformation retraction is a map which captures the idea of continuously shrinking a space into a subspace.
  8. In category theory, a branch of mathematics, a section is a right inverse of a morphism. Dually, a retraction is a left inverse. In other words, if and are morphisms whose composition is the identity morphism on Y, then g is a section of f, and f is a retraction of g.
  9. In mathematics, in the field of group theory, a subgroup of a group is termed a retract if there is an endomorphism of the group that maps surjectively to the subgroup and is identity on the subgroup. ...
  10. A retraction is a public statement, by the author of an earlier statement, that withdraws, cancels, refutes, or diametrically reverses the original statement. ...
  11. (Retracts) Retraction is the anatomical term of motion for posterior movement of the arms at the shoulders
  12. To pull back inside (for example, an airplane retracting its wheels while flying); To take back or withdraw something one has said
  13. (retracted) [ɹəˈtɹæktəd] - adjective for a sound that occurs with the active articulator somewhat further back in the mouth than it usually is (or further back than the IPA symbol without any diacritics might suggest).
  14. (retracted) for scolex, being withdrawn within the body of the metacestode (in a cyst) such that it keeps its definitive configuration (i.e., the scolex itself is not invaginated). Reaching the definitive host, a metacestode with retracted scolex is excysted
  15. (retracting) when the baby is pulling the chest in at the ribs with breathing.
  16. (Retraction) The act of drawing back, the condition of being drawn back.
  17. (Retraction) An abnormal sucking in of the chest during breathing, indicating that the baby is working too hard to breathe.
  18. (Retraction (Gingival)) Lying back of the free gingival tissue to expose the gingival margin area of the preparation by mechanical, chemical, or electrical means.
  19. (Retraction) (or retracted):  Another word for the process of backing (see backing definition, above).
  20. (Retraction) In the law of DEFAMATION, a formal recanting of the libelous or slanderous material.
  21. (Retraction) Operation when the pop-up riser of a sprinkler such as a spray head or rotor returns to the case in the ground.  Also called pop-down.
  22. (Retraction) Process of skin pulling in toward breast tissue. Often referred to as dimpling.
  23. (Retraction) Pulling the skis up towards the body with the legs, to change edges or absorb bumps.
  24. (Retraction) Retractions are used to record a significant ethical problem with a published article in an attempt to correct the publication record. This does not normally mean an article is physically expunged, however. ...