ac·et·al·de·hyde 
(ăs′ĭ-tăldə-hīd′)
(ăs′ĭ-tăldə-hīd′)n.
A colorless, flammable liquid, C2H4O, used to manufacture acetic acid, perfumes, and drugs.
- surface
- surface-active
- surface dive
- surface diver
- surface diving
- surface-effect ship
- surface mail
- surface of revolution
- surface plate
- surface structure
- surface tension
- surface-to-air missile
- surface-to-surface missile
- surface wave
- surfactant
- surf and turf
- surfbird
- surfboard
- surfboarder
- surfboarding
- surfboat
- surfcaster
- surfcasting
- surf clam
- surf duck