milliradian

noun
mil·​li·​ra·​di·​an | \ ˌmi-lə-ˈrā-dē-ən How to pronounce milliradian (audio) \

Definition of milliradian

: one thousandth of a radian

First Known Use of milliradian

1946, in the meaning defined above

History and Etymology for milliradian

International Scientific Vocabulary

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The first known use of milliradian was in 1946

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