- Something that bisects, especially a ray that bisects an angle.二等分物，尤指平分一个角的直线
- double decomposition
- double-digit
- double dipping
- double dribble
- double dutch
- double-edged
- double-entendre
- double entry
- double-faced
- double fault
- double feature
- double fertilization
- double figure
- double flat
- double genitive
- double Gloucester
- double-header
- double helix
- double-hung window
- double indemnity
- double jeopardy
- double-jointed
- double knit
- double negative
- double-park