in·ter·ac·tant 
(ĭn′tər-ăktənt)
(ĭn′tər-ăktənt)n.
One that interacts, especially any of the substances that are part of a chemical interaction.
[INTERACT + -ANT.]
- dowdiness
- dowdy
- dowdyish
- dowel
- dower
- dowitcher
- do without
- Dow Jones Industrial Average
- Dow Jones Wilshire 5000
- down
- down
- down
- down-and-dirty
- down-and-out
- down and out
- down-at-heel
- down-at-the-heel
- down at the heel
- down at the heel/heels
- down at the heels
- down atthe mouth
- downbeat
- down-bow
- downbow
- downburst