[ foh-toh-aw-tuh-trof, -trohf ]
/ ˌfoʊ toʊˈɔ təˌtrɒf, -ˌtroʊf /

noun Biology.

any organism that derives its energy for food synthesis from light and is capable of using carbon dioxide as its principal source of carbon.


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Origin of photoautotroph

First recorded in 1945–50; photo- + autotroph

OTHER WORDS FROM photoautotroph

pho·to·au·to·troph·ic, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for photoautotrophic

/ (ˌfəʊtəʊˌɔːtəʊˈtrɒfɪk) /


(of plants) capable of using light as the energy source in the synthesis of food from inorganic matterSee also photosynthesis
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

Scientific definitions for photoautotrophic

[ fō′tō-ôtə-trŏf′, -trōf′ ]

See phototroph.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.