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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 ?
Although the COMAFFOR is responsible for determining the size, shape, and location of the AFFOR staff and AOC to best support the operation, the admonition against dual-hatted staff positions remains, frequently resulting in overlap of work or, worse, creating a gap.
Afaq's key responsibilities will include enhancing the existing channel to market within Saudi Arabia and work closely with its distributors to expand the presence of AOC within the kingdom.
Emmi's Kaltbach Cave Aged Le Gruyere AOC AOC spends 12 months stored deep underground in carefully controlled conditions to enable it to develop to gourmet perfection.
AOC operated from The Hague for 30 years before it decided to move its base operations to Leiden in 1984.
For AOC-sponsored events, contact: AOC headquarters at 888.
The problem was that no single financial system existed within the organization which could easily review the financial activities of these courts to enable AOC to fulfill its new oversight role as required by AB 233.
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.
Gracias a sus monitores AOC tecnologicamente avanzados y faciles de usar, Top Victory Electronics Co.
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).