What do a.m. and p.m. stand for?


[ker-uh-juh n, -jen] /ˈkɛr ə dʒən, -ˌdʒɛn/
the bituminous matter in oil shale, from which shale oil is obtained by heating and distillation.
Origin of kerogen
1905-10; < Greek kēró(s) wax + -gen Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for kerogen
  • The environment that transformed the kerogen into gas did not favor oil at all.
  • kerogen is a pyrobitumen, and oil is formed from kerogen by heating.
  • The capsule will be heated and the kerogen extracted.
  • kerogen within source rocks is under pressure from overlying sediments.
  • Pyrolysis of both kerogen and shale oil is basically a process of breaking larger molecules into smaller molecules.
  • The organic matter preserved in the shale is kerogen, which when heated can produce crude oil and natural gas.
  • There are technologies available that will convert the kerogen directly into super-low sulfur fuels.
British Dictionary definitions for kerogen


the solid organic material found in some rocks, such as oil shales, that produces hydrocarbons similar to petroleum when heated
Word Origin
C20: from Greek kēro(s) wax + -gen
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
Cite This Source
kerogen in Science
A fossilized mixture of insoluble organic material that, when heated, breaks down into petroleum and natural gas. Kerogen consists of carbon, hydrogen, oxygen, nitrogen, and sulfur and forms from compacted organic material, including algae, pollen, spores and spore coats, and insects. It is usually found in sedimentary rocks, such as shale.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for kerogen

Some English speakers likely know this word

Word Value for kerogen

Scrabble Words With Friends

Nearby words for kerogen