milliradian

[ mil-uh-rey-dee-uh n ]
/ ˈmɪl əˌreɪ di ən /

noun

one thousandth of a radian.

Origin of milliradian

First recorded in 1950–55; milli- + radian
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019