astronomical unit

as·tro·nom·i·cal u·nit

A a

- US Pronunciation
- US IPA
- UK Pronunciation
- UK IPA
- [as-truh-nom-i-kuh l or as-truh-nom-ik yoo-nit]
- /ˌæs trəˈnɒm ɪ kəl or ˌæs trəˈnɒm ɪk ˈyu nɪt/
- /ˌæs.trəˈnɒm.ɪ.kəl ˈjuːnɪt/

- US Pronunciation
- US IPA
- [as-truh-nom-i-kuh l or as-truh-nom-ik yoo-nit]
- /ˌæs trəˈnɒm ɪ kəl or ˌæs trəˈnɒm ɪk ˈyu nɪt/

Definitions of astronomical unit words

noun astronomical unit a unit of distance used in astronomy equal to the mean distance between the earth and the sun. 1 astronomical unit is equivalent to 1.495 × 1011 metres or about 9.3 × 107 miles 3
noun astronomical unit a unit of length based on the mean distance of the earth from the sun, c. 149.6 million km (c. 93 million mi): light travels this distance in c. 8.3 minutes: abbrev. AU 3
noun astronomical unit a unit of length, equal to the mean distance of the earth from the sun: approximately 93 million miles (150 million km). Abbreviation: AU. 1
noun astronomical unit (astronomy) The mean distance from the Earth to the Sun (the semi-major axis of Earth's orbit), approximately 149,600,000 kilometres (symbol AU), used to measure distances in the solar system. 0

before 1900

One of the 17% newest English words

First recorded in 1900-05

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

This term is known only to a narrow circle of people with rare knowledge. Only 3% of English native speakers know the meaning of this word.

According to our data most of word are more popular. This word is almost not used. It has a much more popular synonym.

This diagram is provided by Google Ngram Viewer

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