hy·dro·sul·fu·rous acid 
(hī′drō-sŭl-fyrəs, -sŭlfər-əs)
(hī′drō-sŭl-fyrəs, -sŭlfər-əs)n.
See dithionous acid.
- heart-healthy
- hear things
- hearth money
- hearthrug
- hearthstone
- heartily
- heartiness
- heartland
- heartless
- heartlessly
- heartlessness
- heart-lung machine
- heart massage
- heart of palm
- heart rate
- heart-rending
- heartrending
- Heart River
- heart-searching
- heartsease
- heart's-ease
- heartsick
- heartsickness
- heart-stricken
- heartstring