Definition of annular adjective from the Oxford Advanced Learner's Dictionary

 

annular

 adjective
adjective
BrE BrE//ˈænjələ(r)//
 
; NAmE NAmE//ˈænjələr//
 
(specialist)
 
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shaped like a ring Word Origin late 16th cent.: from French annulaire or Latin annularis, from anulus, annulus ‘a ring’.
See the Oxford Advanced American Dictionary entry: annular