| AHT | aggregation half time; antihyaluronidase titer; augmented histamine test; autogenous hamster tumor |
|---|---|
| H2 | blockers histamine blockers |
| HA | H antigen; Hakim-Adams [syndrome]; halothane anesthesia; Hartley [guinea pig]; headache; health alli... |
| HAP | Handicapped Aid Program; Hazardous Air Pollutants [List]; hazardous air pollution; health alliance p... |
| HC | hair cell; hairy cell; handicapped; head circumference; head compression; health care; healthy contr... |