proper motion

prop·er mo·tion

P p

Transcription

- US Pronunciation
- US IPA
- UK Pronunciation
- UK IPA
- [prop-er moh-shuh n]
- /ˈprɒp ər ˈmoʊ ʃən/
- /ˈprɒpə(r) ˈməʊʃn/

- US Pronunciation
- US IPA
- [prop-er moh-shuh n]
- /ˈprɒp ər ˈmoʊ ʃən/

Definitions of proper motion words

noun proper motion Astronomy. the angular motion of a star relative to a suitably defined frame of reference, expressed in seconds of arc per year. 1
noun proper motion the very small continuous change in the direction of motion of a star relative to the sun. It is determined from its radial and tangential motion 0

See all 2 definitions of proper motion

Information block about the term

Origin of proper motion

First appearance:

before 1595

One of the 38% oldest English words

First recorded in 1595-1605

Historical Comparancy

Parts of speech for Proper motion

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

Full grammatical hierarchy of Proper motion

proper motion popularity

This term is known only to a narrow circle of people with rare knowledge. Only 27% of English native speakers know the meaning of this word.

According to our data about 68% of words is more used. This is a rare but used term. It occurs in the pages of specialized literature and in the speech of educated people.

proper motion usage trend in Literature

This diagram is provided by Google Ngram Viewer

Matching words

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