| bHLH | basic helix-loop-helix |
|---|---|
| bHLH-ZIP | basic helix-loop-helix-leucine zipper |
| HLH | helix-loop-helix; hemophagocytic lymphohistiocytosis |
| HD | Haab-Dimmer [syndrome]; Hajna-Damon [broth]; Hansen disease; hearing distance; heart disease; helix ... |
| HPA | Health Care Practice Act; Health Policy Agenda for the American People; health promotion advocates; ... |