English

Definition of parallel ruler noun from the Oxford Advanced Learner's Dictionary

 

parallel ruler

 noun
noun
BrE BrE//ˌpærəlel ˈruːlə(r)//
 
; NAmE NAmE//ˌpærəlel ˈruːlər//
 
 
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a device for drawing lines that are always the same distance apart, consisting of two connected rulers
See the Oxford Advanced American Dictionary entry: parallel ruler