| AAPHP | American Association of Public Health Physicians |
|---|---|
| AAPS | American Association of Plastic Surgeons; Arizona Articulation Proficiency Scale; Association of Ame... |
| AASP | acute atrophic spinal paralysis; American Association of Senior Physicians; ascending aorta synchron... |
| ACCP | American College of Chest Physicians; American College of Clinical Pharmacology; American College of... |
| ACEP | American College of Emergency Physicians |
| lateral mass of ethmoid bone | A mass of air cells with thin bony walls forming part of the lateral wall of the nasal cavity; the cells are arranged in three groups, anterior, middle, and posterior, and are closed laterally by the orbital plate which forms part of the wall of the orbit. Synonym: labyrinthus ethmoidalis, ectethmoid, ectoethmoid, lateral mass of ethmoid bone. (05 Mar 2000) |
|---|---|
| fourth ventricle mass | <radiology> IN ADULTS: choroid plexus papilloma, haemangioblastoma, vermian metastasis, arteriovenous malformation (AVM), inflammatory mass/cyst IN KIDS: medulloblastoma, uniform enhancement, homogeneous, ependymoma, patchy enhancement, heterogeneous, calcified (12 Dec 1998) |
| law of mass action | <chemistry> This law states that the rate of a given chemical reaction is proportional to concentration of the reactants. (09 Oct 1997) |