Standard Lemma guide

milliradian

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

An SI unit of plane angular measure equal to one thousandth of a radian

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a unit of angular distance equal to one thousandth of a radian

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: angular unit

History

Etymology

Etymology tree Proto-Indo-European *sem- Proto-Indo-European *sm̥- Proto-Indo-European *-ih2 Proto-Indo-European *smih2 Proto-Indo-European *ǵhes- Proto-Indo-European *-lom Proto-Indo-European *ǵhéslom Proto-Indo-European *-ih2 Proto-Indo-European *ǵhéslih2 Proto-Indo-European *smih2ǵhéslih2 Proto-Italic *smīɣeslī Latin mīlleder. French milli- English milli- English radian English milliradian From milli- + radian.

Across languages

Translations

2 source translations are retained for this English entry.

  • Finnish: milliradiaani — one thousandth of a radian
  • French: milliradian — one thousandth of a radian