| 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 |