Attogram

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    An SI unit of mass equal to 10⁻¹⁸ grams. Symbol: ag

Synonyms

All synonyms
agagzeptokilogram

Etymology

From atto- + gram.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.