rectilinear
adjective /ˌrektɪˈlɪniə(r)/
/ˌrektɪˈlɪniər/
(specialist)- in a straight line
- rectilinear motion
- having straight lines
- rectilinear forms
Word Originmid 17th cent.: from late Latin rectilineus (from Latin rectus ‘straight’ + linea ‘line’) + -ar.