Definition of subtend verb from the Oxford Advanced American Dictionary

 

subtend

 verb
verb
NAmE//səbˈtɛnd//
 
subtend something(geometry)Verb Forms present simple I / you / we / they subtend
 
he / she / it subtends
 
past simple subtended
 
-ing form subtending
 
 
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(of a line or chord) to be opposite to an arc or angle
See the Oxford Advanced Learner's Dictionary entry: subtend