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Abbreviation for anodal opening contraction.


Abbreviation for:
administrator on call
Adult Opportunity Centre (Medspeak-UK) 
advanced ovarian cancer
aortic constriction
area over the curve


(kon-trak'shon) [L. contractio, a drawing together]
A shortening or tightening, as of a muscle; a shrinking or a reduction in size.

anodal opening contraction

Abbreviation: AOC
Contraction of the muscles at the anode when the electrical circuit is open.

Braxton Hicks contraction

See: Braxton Hicks contractions

carpopedal contraction

A contraction of the flexor muscles of the hands and feet due to tetany, hypocalcemia, or hyperventilation.

concentric muscle contraction

Contraction of a muscle in which the extended muscle is shortened. Pulling the body up by grasping a bar over the head is such a contraction.

eccentric muscle contraction

Lengthening of the muscle as it contracts against resistance. Lowering the body from a position in which the body was supported by the flexed arms, i.e., holding onto a bar above the head, is such a contraction.

graduated muscular contractions

1. The mechanism by which all smooth, coordinated muscle activity occurs. Normally controlled involuntarily by the central nervous system, motor units are recruited and stimulated at an intensity needed to accomplish a desired activity.
2. Contractions accomplished by use of electric current of varying strength and duration. This method is used in muscles with an intact nerve supply when muscles are atonic, wasted away, or when voluntary exercise is not feasible, and in denervated muscles, as in cases following nerve injury or poliomyelitis.

hourglass contraction

An excessive, irregular contraction of an organ at its center.
See: ectasia

idiomuscular contraction

Motion produced by degenerated muscles without nerve stimulus.

incoordinate uterine contraction

An abnormality of the first stage of labor in which uterine contractions are too weak or too ineffective to dilate the cervix.

isoinertial muscle contraction

Shortening and increased tension in a muscle against a constant load or resistance.

isometric contraction

A muscular contraction in which the muscle increases tension but does not change its length.
Synonym: static muscle contraction

isotonic contraction

A muscular contraction in which the muscle maintains constant tension by changing its length during the action.

lead pipe contraction

A cataleptic condition during which limbs remain in any position in which they have been placed.

premature ventricular contraction

Abbreviation: PVC
Contraction of the cardiac ventricle before the normal time, caused by an electrical impulse to the ventricle arising from a site other than the sinoatrial node. The PVC may be a single event or may occur several times a minute or in pairs or strings. Three or more PVCs in a row constitute ventricular tachycardia.

static muscle contraction

Isometric contraction.

tetanic contraction

1. Continuous muscular contraction.
2. A sudden, strong, sustained uterine contraction that jeopardizes maternal and fetal status. It may occur during oxytocin induction or stimulation of labor and can cause profound fetal distress, premature placental separation, or uterine rupture.

tonic contraction

Spasmodic contraction of a muscle for an extended period.

anodal opening contraction

Abbreviation: AOC
Contraction of the muscles at the anode when the electrical circuit is open.
See also: contraction


n an acronym for the Aromatherapy Organizations Council.
References in periodicals archive ?
Our retail customers and their shoppers will be delighted to see the return of our AOC Camembert," said European export manager Stephane Plessis.
AOC will use the proceeds from its share sale to Showa Shell to finance the development of resources.
CARS is based on the mySAP Public Sector platform and resides on systems currently housed at AOC headquarters in San Francisco.
AOC and KPC signed a 20-year contract under which the latter was to supply the Japanese company with at least 100,000 b/d of Kuwaiti crude oil, with an option for an additional 70,000 b/d.
To address this concern, AOC developed Atryl TCA, a more robust SMC resin that is reported to provide a 50% reduction in surface waviness compared with traditional SMC surfaces, and a 69% increase in toughness compared with traditional SMC resins.
AOC offers quality and value at the right price," says Alec Chan, director general, AOC do Brasil Monitores Ltda.
AOC Monitors has introduced the LM800 LCD display, to it's family of monitors.
AOC will bid for the fields in competition with Western firms but on the basis of a service contract (as Kuwaiti law now forbids the granting of concessions).
To participate in next year's award program, call the Institute at 212-596-6157 or AOC at 800-327-1117 (x284).
Arabian Oil participated in the project by contributing funds to AEDC Vietnam through its subsidiary AOC Energy Development Co.
And so began what would become a deep and enduring friendship between Sulnick and Danson, which has been at the core of AOC since its founding in 1987.