diesel engine


noun

a compression-ignition engine in which a spray of fuel, introduced into air compressed to a temperature of approximately 1000° F (538° C), ignites at a virtually constant pressure.

Nearby words

  1. dies committee,
  2. dies irae,
  3. dies non,
  4. diesel,
  5. diesel cycle,
  6. diesel fuel,
  7. diesel oil,
  8. diesel-electric,
  9. diesel-hydraulic,
  10. dieseling

Origin of diesel engine

First recorded in 1890–95

Also called diesel.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for diesel engine

diesel engine

diesel motor

noun

a type of internal-combustion engine in which atomized fuel oil is sprayed into the cylinder and ignited by compression alone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for diesel engine

diesel engine

[ dēzəl ]

An internal-combustion engine in which the fuel oil is ignited by the heat of air that has been highly compressed in the cylinder, rather than by a spark. Due to the need for the engine to withstand very high pressures, diesel engines are relatively heavy; however, they are relatively fuel-efficient, especially when running at low power.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.