retraction Quick reference
The Oxford Dictionary of Sports Science & Medicine (3 ed.)
... Non-angular backward movement in a transverse plane that returns a protracted bone or body-part to its original position. An example of retraction is squaring the shoulders in a military-like stance. Compare protraction...
retraction Quick reference
A Dictionary of Dentistry (2 ed.)
...retraction n. 1. The drawing back of tissue to gain access to or expose a given part. 2. The distal movement of teeth usually achieved during orthodontic therapy. 3. The distal or retrusive movement of the jaw. See also gingival retraction...
retraction Quick reference
A Dictionary of Journalism
...retraction A form of correction that withdraws the offending piece of journalism and/or states that it was untrue. See also apologies...
retraction Reference library
Garner's Modern English Usage (5 ed.)
... ; ⋆retractation . In the figurative sense “the act of recanting” or “a statement in recantation,” retraction has been the usual term in AmE since 1800 and in BrE since 1860 . After the mid-1800s, ⋆retractation became a chiefly BrE variant. In both varieties of English, retraction is the noun corresponding to retract in literal senses as well (“to draw back,” etc.). Current ratio in print ( retraction vs. ⋆ retractation ): 55:1 ...
retraction Quick reference
The Concise Oxford Dictionary of Mathematics (6 ed.)
...retraction A retraction of a topological space X to a subspace Y ⊆ X is a continuous function r : X → Y such that r ( y ) = y for all y ∊ Y , and Y is referred to as a retract of X . Every continuous function f : A → Z can then be extended to g : X → Z , where g = f ∘ r...
retraction n. Quick reference
Concise Medical Dictionary (10 ed.)
... n. 1. (in obstetrics) the state of uterine muscle fibres remaining shortened after contracting during labour. This results in a gradual progression of the fetus downwards through the pelvis. The basal portion of the uterus becomes thicker and pulls up the dilating cervix over the presenting part. 2. (in dentistry) the drawing back of one or more teeth into a better position by an orthodontic appliance . 3. (in dentistry) the stretching of facial tissues to expose only the teeth during dental...
retraction n. Quick reference
A Dictionary of Nursing (8 ed.)
... [ri- trak -shŏn] n. 1. ( in obstetrics ) the state of uterine muscle fibres remaining shortened after contracting during labour. This results in a gradual progression of the fetus downward through the pelvis. r. ring a depression in the uterine wall marking the junction between the actively contracting muscle fibres of the upper segment and the muscle fibres of the lower segment of the uterus. This depression is not always visible and is normal. Compare Bandl’s ring . 2. ( in dentistry ) the drawing back of one or more teeth into a better...
clot retraction Reference library
Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)
...retraction the contraction of a blood clot after its formation, accompanied by the expression of...
gingival retraction Quick reference
A Dictionary of Dentistry (2 ed.)
...gingival retraction The laying back of the free gingivae to expose the gingival margin of a preparation using mechanical, chemical, or electrical methods. Gingival retraction cord is an absorbent string usually impregnated with a haemostatic agent such as aluminium chloride, ferric chloride, or ferric sulphate, which is gently inserted into the gingival crevice ( sulcus ) to provide mechanical tissue displacement. Gingival retraction cord containing epinephrine is contraindicated in patients with cardiac arrhythmias; viscous gels or pastes may be used...
retraction ring Quick reference
Concise Medical Dictionary (10 ed.)
... ring a depression in the uterine wall marking the junction between the actively contracting muscle fibres of the upper segment of the uterus and the muscle fibres of the lower segment. This depression is not always visible and is normal. In obstructed labour (e.g. contracted pelvis or malposition of the fetus resulting in shoulder presentation), the muscle fibres of the upper segment become shorter and thicker; the muscle fibres of the lower segment, on the other hand, become elongated and thinner. The junction between the two becomes more distinct as...
Duane retraction syndrome Quick reference
A Dictionary of Biomedicine (2 ed.)
...Duane retraction syndrome A congenital disorder of eye movement caused by developmental abnormality in cranial nerve VI. Duane retraction syndrome 1 ( DURS1 ) maps to chromosome 8 and DURS2 is caused by mutation in chimerin- α . A third form ( DURS3 ) involves deficiency in both adductor and abductor...
retraction n Reference library
Oxford Business French Dictionary: English-French
... n ( of offer, statement ) rétraction ...
retraction n Quick reference
Pocket Oxford Italian Dictionary: English-Italian (4 ed.)
... / rɪˈtrækʃn / n ritiro m ; ( of statement, accusation ) ritrattazione ...
retraction n Reference library
Oxford Business Spanish Dictionary: English-Spanish
... n ( of evidence, statement ) retractación ...
retraction noun Quick reference
New Oxford American Dictionary (3 ed.)
... / rə'trækʃ(ə)n / ▶ noun 1 the action of drawing something back or back in : prey are grasped between the jaws upon tongue retraction . action of drawing something back or back in action Aviation retraction retractions 2 a withdrawal of a statement, accusation, or undertaking : he issued a retraction of his allegations . withdrawal of statement, accusation, or undertaking...
retraction noun Quick reference
Oxford Dictionary of English (3 ed.)
... / rɪ'trakʃ(ə)n / ▶ noun 1 [ mass noun ] the action of drawing something back or back in : prey are grasped between the jaws upon tongue retraction . action of drawing something back or back in action Aviation retraction retractions 2 [ count noun ] a withdrawal of a statement, accusation, or undertaking : he issued a retraction of his allegations . withdrawal of statement, accusation, or undertaking...
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