| HiPRF | high pulse repetition frequency |
|---|---|
| HT | Hashimoto thyroiditis; hearing test; hearing threshold; heart; heart transplantation, heart transpla... |
| IDF | inverse document frequency |
| IF | idiopathic fibroplasia; idiopathic flushing; immersion foot; immunofluorescence; indirect fluorescen... |
| IPFM | integral pulse frequency modulation |