- line balance
- line bisector
- line bundle
- line-chromatic number
- line-circle intersection
- line-colored
- line complex
- line congruence
- line congruence theory
- line conic
- line connectivity
- line coordinate
- line-covering number
- line-critical graph
- line-disjoint
- line element
- line element field
- line-ellipse intersection
- line equation
- line feed
- line geometry
- line graph
- line group
- line integral
- line involution