galactic year

noun

Astronomy.

the duration of a complete rotation of the Milky Way, approximately 200 million years.

Discover More

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Of course, even from the beginning, new and unforeseen problems manifested themselves ... from "Man In Antiquity" published in Terra City, Sol Galactic Year 3,502.