We found one dictionary that defines the word submilliarcsecond:

General (1 matching dictionary)

1. submilliarcsecond: Wiktionary

Definitions from Wiktionary (submilliarcsecond) ▸ adjective:  Smaller than one milliarcsecond ▸ Words similar to submilliarcsecond ▸ Usage examples for submilliarcsecond ▸ Idioms related to submilliarcsecond ▸ Wikipedia articles (New!) ▸ Popular nouns described by submilliarcsecond ▸ Words that often appear near submilliarcsecond ▸ Rhymes of submilliarcsecond ▸ Invented words related to submilliarcsecond