| COC | cathodal opening contraction; coccygeal; combination oral contraceptive |
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| COCl | cathodal opening clonus |
| COTe | cathodal opening tetanus |
| FVOP | finger venous opening pressure |
| IO | incisal opening; inferior oblique; inferior olive; internal os; interorbital; intestinal obstruction... |
| pharyngeal opening of eustachian tube | An opening in the upper part of the nasopharynx about 1.2 cm behind the posterior extremity of the inferior concha on each side. Synonym: ostium pharyngeum tubae auditivae, pharyngeal opening of eustachian tube. (05 Mar 2000) |
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| piriform opening | The anterior nasal opening in the skull. Synonym: apertura piriformis, piriform opening. (05 Mar 2000) |
| cornua of falciform margin of saphenous opening | See: inferior horn of falciform margin of saphenous opening, superior horn of falciform margin of saphenous opening. (05 Mar 2000) |
| saphenous opening | The opening in the fascia lata inferior to the medial part of the inguinal ligament through which the saphenous vein passes to enter the femoral vein. Synonym: hiatus saphenus, fossa ovalis, saphenous hiatus. (05 Mar 2000) |
| horns of saphenous opening | See: inferior horn of falciform margin of saphenous opening, superior horn of falciform margin of saphenous opening. (05 Mar 2000) |
| superior horn of falciform margin of saphenous opening | The upper part of the falciform margin of the opening in the fascia lata through which the greater saphenous vein passes. Synonym: cornu superius marginalis falciformis, Burns' falciform process, Burns' ligament, Hey's ligament. (05 Mar 2000) |
| ileocaecal opening | The opening of the terminal ileum into the large intestine at the transition between the caecum and the ascending colon. Synonym: ostium ileocaecale, ileocaecal opening. (05 Mar 2000) |
| inferior horn of falciform margin of saphenous opening | The lower part of the falciform margin of the opening in the fascia lata through which the greater saphenous vein passes. Synonym: cornu inferius marginalis falciformis hiatus sapheni. (05 Mar 2000) |
| intercartilaginous part of glottic opening | The opening between the vocal processes of the arytenoid cartilages. Synonym: pars intercartilaginea rimae glottidis, glottis respiratoria, intercartilaginous part of glottic opening. (05 Mar 2000) |
| intermembranous part of glottic opening | The portion of the opening anterior to the vocal processes of the arytenoid cartilages bounded by the vocal ligaments. Synonym: pars intermembranacea rimae glottidis, glottis vocalis, intermembranous part of glottic opening. (05 Mar 2000) |
| internal urethral opening | The internal opening or orifice of the urethra, at the anterior and inferior angle of the trigone. Synonym: ostium urethrae internum, internal urethral opening. (05 Mar 2000) |
| oesophageal opening | The opening in the right crus of the diaphragm, between the central tendon and the hiatus aorticus, through which pass the oesophagus and the two vagus nerves. Synonym: hiatus oesophageus, oesophageal opening. (05 Mar 2000) |
| opening | 1. The act or process of opening; a beginning; commencement; first appearance; as, the opening of a speech. "The opening of your glory was like that of light." (Dryden) 2. A place which is open; a breach; an aperture; a gap; cleft, or hole. "We saw him at the opening of his tent." (Shak) 3. Hence: A vacant place; an opportunity; as, an opening for business. 4. A thinly wooded space, without undergrowth, in the midst of a forest; as, oak openings. Source: Websters Dictionary (01 Mar 1998) |
| opening axis | An imaginary line around which the mandibular condyles may rotate during opening and closing movements. Compare: fulcrum line. (05 Mar 2000) |
| opening contraction | A contraction produced at the time of opening the circuit when using direct current to stimulate the muscle or a motor nerve. (05 Mar 2000) |