- A galaxy having a spiral structure.旋涡星系，螺旋星系：具有螺旋形结构的星系
- cognitive
- cognitive-behavioral therapy
- cognitive dissonance
- cognitive science
- cognitive therapy
- cognizable
- cognizance
- cognizances
- cognizant
- cognomen
- cognomens
- cognomina
- cognoscente
- cognoscenti
- cogon
- cogongrass
- cogons
- cog railroad
- cog railway
- cogs
- Cogswell chair
- Cogswell College
- Cogswell College
- Cogswell College North
- cogwheel