Added 9 October 2026 milliradian noun Categories: Describing WordsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about milliradian at Wordnik → Where our words come from → A unit of angular distance equal to one thousandth of a radian. Related Words: microradianmilliradmicroradmilliarcsecondmegaradmicrometremillarcsecondmillimicronmicrounitmilliaremilliarcsec Back to today's word