attojoule

Etymology

From atto- + joule.

attojoule means an SI unit of energy, work, and heat equal to 10⁻¹⁸ joules. Symbol: aJ. Lexicurio rates it Sui generis — a strength score of 88 out of 100.

noun

An SI unit of energy, work, and heat equal to 10⁻¹⁸ joules. Symbol: aJ