Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

autotroph

noun au·to·troph \ ˈȯ-tə-ˌtrōf , -ˌträf \

Definition of autotroph

: an autotrophic organism

See autotroph defined for kids

Origin and Etymology of autotroph

German, from autotroph, adjective

Medical Dictionary

autotroph

noun au·to·troph \ ˈȯt-ə-ˌtrōf , -ˌträf \

medical Definition of autotroph

: an autotrophic organism

Learn More about autotroph

  1. See words that rhyme with autotroph Britannica.com: Encyclopedia article about autotroph

Seen and Heard

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

show hide

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

pro rata

play

in proportion

Get Word of the Day daily email!

TRENDING NOW

  1. exculpatory 'tending or serving to exculpate'

  2. ideologue 'an often blindly partisan advocate or adherent of a particular ideology'

  3. socialism 'a way of organizing a society in which major industries are owned and controlled by the government'

  4. uphold 'to let stand'

  5. due process 'a course of formal proceedings (as judicial proceedings)'

SEE ALL

BROWSE DICTIONARY

autotroph

Test Your Vocabulary

Test Your Emoji Exceptionalism

  • test-your-emoji-exceptionalism-written-with-a-lot-of-emoji
  • What is this emoji intended to represent: 🤳
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games