| HAM | hearing aid microphone; helical axis in motion; human albumin microsphere; human alveolar macrophage... |
|---|---|
| HPAA | hydroperoxyarachidonic acid; hydroxyphenylacetic acid; hypothalamo-pituitary-adrenal axis |
| LAD | lactic acid dehydrogenase; left anterior descending [artery]; left axis deviation; leukocyte adhesio... |
| LAD-MIN | left axis deviation, minimal |
| LAX, LAx | long axis |
| axis, principal | <microscopy> A line conceived as passing through the centre of a lens to connect the centres of curvature of the lens surfaces. The focal points of a lens lie on the principal axis. (05 Aug 1998) |
|---|---|
| axis shift | Deflection of the electrical axis of the heart to the right or left of the normal. See: left axis deviation, right axis deviation, axis. Synonym: axis shift. (05 Mar 2000) |
| axis traction | Rarely used procedure to apply traction upon the foetal head in the line of the birth canal by means of axis traction forceps. (05 Mar 2000) |
| axis-traction forceps | Obstetrical forceps provided with a second handle so attached that traction can be made in the line in which the head must move in the axis of the pelvis. (05 Mar 2000) |
| basibregmatic axis | A line extending from the basion to the bregma. (05 Mar 2000) |
| basicranial axis | A line drawn from the basion to the midpoint of the sphenoethmoidal suture. (05 Mar 2000) |
| basifacial axis | A line drawn from the subnasal point to the midpoint of the sphenoethmoidal suture. Synonym: facial axis. (05 Mar 2000) |
| biauricular axis | A straight line joining the two auricles. Compare: auriculare. (05 Mar 2000) |
| mandibular axis | An imaginary line around which the mandible may rotate through the horizontal plane. Synonym: hinge axis, mandibular axis. (05 Mar 2000) |
| vertical axis | In dentistry, the line around which the working side condyle rotates in the horizontal plane during mandibular movement. (05 Mar 2000) |
| mean electrical axis | The average magnitude and direction of all the electromotive forces developed during the cardiac event under consideration; e.g., atrial or ventricular depolarisation, or ventricular repolarization. See: axis deviation. (05 Mar 2000) |
| visual axis | The straight line extending from the object seen, through the centre of the pupil, to the macula lutea of the retina. Synonym: line of vision. (05 Mar 2000) |
| cephalocaudal axis | cephalocaudal axis |
| pelvic axis | A hypothetical curved line joining the centre point of each of the four planes of the pelvis, marking the centre of the pelvic cavity at every level. Synonym: axis pelvis, plane of pelvic canal. (05 Mar 2000) |
| cerebrospinal axis | The central nervous system; the brain and spinal cord. Synonym: encephalomyelonic axis, neural axis. (05 Mar 2000) |