energy density
Americannoun
Etymology
Origin of energy density
First recorded in 1955–60
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The 1.65 megajoules per kilogram recorded in their February paper is significantly greater than the energy density of lithium-ion batteries, currently the most popular type of battery for phones and electric cars.
From BBC • May 7, 2026
Actual charging times and energy density depend on vehicle specifications and real-world conditions.
From The Wall Street Journal • Mar. 28, 2026
The knots, however, behaved more like ordinary matter, so their energy density decreased much more slowly.
From Science Daily • Dec. 7, 2025
We’re looking at new materials, like gallium nitride and silicon carbide, to drive new energy density and energy efficiency.
From Barron's • Oct. 8, 2025
Moreover, the rate of expansion of the universe would automatically become very close to the critical rate determined by the energy density of the universe.
From "A Brief History of Time: And Other Essays" by Stephen Hawking
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
