Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

geothermal

play
adjective geo·ther·mal \-ˈthər-məl\

Simple Definition of geothermal

  • : of, relating to, or using the natural heat produced inside the Earth; also : produced by such heat

Source: Merriam-Webster's Learner's Dictionary

Full Definition of geothermal

  1. :  of, relating to, or utilizing the heat of the earth's interior; also :  produced or permeated by such heat <geothermal steam> <geothermal regions>

geothermally play \-mə-lē\ adverb

Origin of geothermal

International Scientific Vocabulary


First Known Use: 1875


Seen and Heard

What made you want to look up geothermal? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

immature or lacking adult sophistication

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

maudlin prompt angry oily
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ