| AO | abdominal aorta; achievement orientation; acid output; acridine orange; ankle orthosis; anodal openi... |
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| ARAO | angiographic area of right anterior oblique projection |
| IO | incisal opening; inferior oblique; inferior olive; internal os; interorbital; intestinal obstruction... |
| LAO | left anterior oblique; left atrial overload; Licentiate of the Art of Obstetrics |
| LIO | left inferior oblique |
| superior oblique | <anatomy, muscle> Origin, above the medial margin of the optic canal; insertion, by a tendon passing through the trochlea, or pulley, and then reflected backward, downward, and laterally to the sclera between the superior and lateral recti; action, primary, intorsion; secondary, depression and abduction; nerve supply, trochlear nerve. Synonym: musculus obliquus superior. (05 Mar 2000) |
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| superior oblique muscle of head | <anatomy, muscle> Origin, transverse process of atlas; insertion, lateral third of inferior nuchal line; action, rotates head; nerve supply, suboccipital. See: suboccipital muscles. Synonym: musculus obliquus capitis superior, superior oblique muscle of head. (05 Mar 2000) |
| illumination, oblique | <microscopy> Illumination from light inclined at an oblique angle to the optical axis. (05 Aug 1998) |
| inferior oblique | <anatomy, muscle> Origin, orbital plate of maxilla lateral to the lacrimal groove; insertion, sclera between the superior and lateral recti; action, primary, extorsion; secondary, elevation and abduction; nerve supply, oculomotor (inferior branch). Synonym: musculus obliquus inferior. (05 Mar 2000) |
| inferior oblique muscle of head | <anatomy, muscle> Origin, spinous process of axis; insertion, transverse process of the atlas; action, rotates head; origin, spinous process of axis; insertion, transverse process of the atlas; nerve supply, suboccipital. See: suboccipital muscles. Synonym: musculus obliquus capitis inferior, inferior oblique muscle of head. (05 Mar 2000) |
| internal oblique | <anatomy, muscle> Origin, iliac fascia deep to lateral part of inguinal ligament, anterior half of crest of ilium, and lumbar fascia; insertion, tenth to twelfth ribs and sheath of rectus; some of the fibres from inguinal ligament terminate in the conjoint tendon; action, diminishes capacity of abdomen, flexes lumbar vertebral column (bends thorax forward); nerve supply, lower thoracic. Synonym: musculus obliquus internus abdominis, abdominal internal oblique muscle. (05 Mar 2000) |
| oblique | 1. Not erect or perpendicular; neither parallel to, nor at right angles from, the base; slanting; inclined. "It has a direction oblique to that of the former motion." (Cheyne) 2. Not straightforward; indirect; obscure; hence, disingenuous; underhand; perverse; sinister. "The love we bear our friends. Hath in it certain oblique ends." (Drayton) "This mode of oblique research, when a more direct one is denied, we find to be the only one in our power." (De Quincey) "Then would be closed the restless, oblique eye. That looks for evil, like a treacherous spy." (Wordworth) 3. Not direct in descent; not following the line of father and son; collateral. "His natural affection in a direct line was strong, in an oblique but weak." (Baker) Oblique angle, Oblique ascension, etc. See Angle,Ascension, etc. Oblique arch, that part of the curtain whence the fire of the opposite bastion may be discovered. Oblique leaf. <botany> A system in which the coordinate axes are oblique to each other. Origin: F, fr. L. Obliquus; ob (see Ob-) + liquis oblique; cf. Licinus bent upward, Gr slanting Alternative forms: oblike. <geometry> An oblique line. Source: Websters Dictionary (01 Mar 1998) |
| oblique amputation | Amputation in which the line of section through an extremity is at other than a right angle; this yields an oval appearance to the cut surface (hence sometimes, though rarely, referred to as an oval amputation). (05 Mar 2000) |
| oblique arytenoid | <anatomy, muscle> Origin, muscular process of arytenoid cartilage; insertion, summit of arytenoid cartilage of opposite side and continuing as the aryepiglottic muscle in the aryepiglottic fold to the epiglottis; action, narrows the interarytenoid portion of the rima glottidis; nerve supply, recurrent laryngeal. Synonym: musculus arytenoideus obliquus, arytenoideus. (05 Mar 2000) |
| oblique auricular muscle | <anatomy> A thin band of oblique muscular fibres extending from the upper part of the eminence of the concha to the convexity of the helix, running across the groove corresponding to the inferior crus of the anthelix. Synonym: musculus obliquus auriculae, oblique muscle of auricle, Tod's muscle. (05 Mar 2000) |
| oblique bandage | A bandage in which the successive turns proceed obliquely up or down the limb. (05 Mar 2000) |
| oblique bundle of pons | A bundle of fibres in the ventral surface of the pons running from the anterior mesial portion outward and backward. Synonym: fasciculus obliquus pontis, oblique bundle of pons. (05 Mar 2000) |
| oblique cord | A slender band extending from the lateral part of the coronoid process of the ulna distad and laterad to the radius immediately distal to the bicipital tuberosity. Synonym: chorda obliqua, oblique cord, round ligament of elbow joint, Weitbrecht's cord, Weitbrecht's ligament. (05 Mar 2000) |
| oblique diameter | A measurement across the pelvic inlet from the sacroiliac joint of one side to the opposite iliopectineal eminence. Synonym: diameter obliqua. (05 Mar 2000) |
| oblique facial cleft | Congenital facial cleft from mouth to the inner canthus of the eye. Synonym: oblique facial cleft. Origin: prosopo-+ G. Schisis, fissure (05 Mar 2000) |