Zeptojoule
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 An SI unit of energy equal to 10⁻²¹ joules. Symbol: zJ
"When a bundle with a drag coefficient of 200 nN · sec · m⁻¹ (Howard and Hudspeth, 1988) produced a 25 nm, triangle-wave twitch 5 msec in total duration (Fig. 12A), the energy dissipated against viscous drag was ~100 zJ (a zeptojoule is 10⁻²¹ J)."
Example
More examples"When a bundle with a drag coefficient of 200 nN · sec · m⁻¹ (Howard and Hudspeth, 1988) produced a 25 nm, triangle-wave twitch 5 msec in total duration (Fig. 12A), the energy dissipated against viscous drag was ~100 zJ (a zeptojoule is 10⁻²¹ J)."
Etymology
From zepto- + joule.
More for "zeptojoule"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.