hy·dro·col·loid 
(hī′drə-kŏloid′)
(hī′drə-kŏloid′)n.
1. A substance that forms a gel with water.
2. The gel that is so formed.
hy′dro·col·loidal (-kə-loidl) adj.
- 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
- heart-struck
- heartthrob
- heart-to-heart
- heartwarming