We found one dictionary that defines the word atto-sievert:

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1. atto-sievert: Wiktionary

▸ Words similar to atto-sievert ▸ Usage examples for atto-sievert ▸ Idioms related to atto-sievert ▸ Wikipedia articles (New!) ▸ Words that often appear near atto-sievert ▸ Rhymes of atto-sievert ▸ Invented words related to atto-sievert