| MHA | major histocompatibility antigen; May-Hegglin anomaly; Mental Health Association; methemalbumin; mic... |
|---|---|
| MHV | magnetic heart vector; middle hepatic vein; mouse hepatitis virus |
| mid | middle |
| MIP | macrophage inflammatory protein; major intrinsic protein; maximum inspiratory pressure; maximum inte... |
| ML | Licentiate in Medicine; Licentiate in Midwifery; malignant lymphoma; marked latency; maximum likelih... |
| middle mediastinum | The central portion of the inferior mediastinum which contains the pericardium and its contents and the phrenic nerves and accompanying vessels. Synonym: mediastinum medium. (05 Mar 2000) |
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| middle meningeal artery | Origin, maxillary; branches, petrosal, superior tympanic, frontal and parietal; distribution, to parts mentioned and through terminal branches to anterior and middle cranial fossae; anastomoses, meningeal branches of occipital, ascending pharyngeal, ophthalmic and lacrimal, stylomastoid, accessory meningeal branch of maxillary, and deep temporal. Synonym: arteria meningea media. (05 Mar 2000) |
| middle meningeal artery groove | A narrow groove on the inner table of the calvarium, seen on lateral radiographs as a thin dark line, which may be mistaken for a skull fracture. See: sulci arteriosi. (05 Mar 2000) |
| middle meningeal branch of maxillary nerve | <anatomy, nerve> Recurrent branch of maxillary nerve distributed with the anterior branch of the middle meningeal arteyr to the meninges of the anterior portion of the middle cranial fossa. Synonym: ramus meningeus medius nervi maxillaris, middle meningeal nerve. (05 Mar 2000) |
| middle meningeal nerve | <anatomy, nerve> Recurrent branch of maxillary nerve distributed with the anterior branch of the middle meningeal arteyr to the meninges of the anterior portion of the middle cranial fossa. Synonym: ramus meningeus medius nervi maxillaris, middle meningeal nerve. (05 Mar 2000) |
| middle meningeal veins | The venae comitantes of the middle meningeal artery that empty into the pterygoid plexus. Synonym: venae meningeae mediae. (05 Mar 2000) |
| middle nasal concha | The middle thin, spongy, bony plate with curved margins, part of the ethmoidal labyrinth, projecting from the lateral wall of the nasal cavity and separating the superior meatus from the middle meatus, the above bony plate and its thick mucoperiosteum containing a cavernous vascular bed for heat exchange. Synonym: concha nasalis media, middle turbinated bone, turbinated body. (05 Mar 2000) |
| middle pain | <gynaecology> One-sided lower abdominal (pelvic) pain that occurs at or around the time of ovulation (midcycle). Thought to be secondary to a stretching of the ovarian capsule and subsequent capsular rupture during expulsion of the egg. Inevitably, there is some bleeding associated with this normal month function that can inflame the peritoneum and cause pain. (27 Sep 1997) |
| middle palmar space | The more medial of the central palmar spaces, bounded medially by the hypothenar compartment; related distally to the synovial tendon sheaths of digits 3 and 4 and proximally to the common flexor sheath. Synonym: medial midpalmar space, middle palmar space. (05 Mar 2000) |
| middle piece | A part of the spermatozoon characterised by an axoneme and by a sheath of mitochondria arranged in a tight helix. Principal piece, the principal part of the spermatozoon, which is about 45 um long and has a characteristic fibrous sheath surrounding the axoneme. (05 Mar 2000) |
| middle radioulnar joint | radioulnar syndesmosis |
| middle sacral artery | <anatomy, artery> Origin, posterior aspect of abdominal aorta just above the bifurcation; distribution, lower lumbar vertebrae, sacrum, and coccyx; anastomoses, lateral sacral, superior and middle rectal. Synonym: arteria sacralis mediana, middle sacral artery. (05 Mar 2000) |
| middle sacral plexus | A lymphatic plexus formed of lymph nodes and connecting vessels situated chiefly in the mesorectum anterior and inferior to the sacral promontory. Synonym: plexus sacralis medius. (05 Mar 2000) |
| middle scalene muscle | <anatomy, muscle> Origin, costotransverse lamellae of transverse processes of second to sixth cervical vertebrae; insertion, first rib posterior to subclavian artery; action, raises first rib; nerve supply, cervical plexus. Synonym: musculus scalenus medius, middle scalene muscle. (05 Mar 2000) |
| middle stage HIV disease | <disease> This refers to an HIV infection that is characterised by signs and symptoms of HIV that are not life-threatening. Examples include oral thrush, gingivitis, seborrheic dermatitis, molluscum contangiosum, fevers, fatigue, lymph node swelling, malaise and weight loss. This stage can be a signal for the conversion from asymptomatic HIV disease to HIV disease (moe pronouced symptoms include joint pains). AIDS is diagnosed after HIV disease has started to manifest life-threatening oppotunistic infections (for example pneumocystis, cryptosporidium, toxoplasmosis, etc). (27 Sep 1997) |