phototroph: meaning, definition, pronunciation and examples
C2Scientific/Technical
Quick answer
What does “phototroph” mean?
An organism that obtains energy from light.
Audio
Pronunciation
Definition
Meaning and Definition
An organism that obtains energy from light
A living entity that uses sunlight as its primary energy source for metabolic processes, typically through photosynthesis
Dialectal Variation
British vs American Usage
Differences
No significant lexical or semantic differences. Spelling follows respective regional conventions in compound usage.
Connotations
Identical scientific meaning in both varieties
Frequency
Equally rare in general discourse; used exclusively in biological/ecological contexts
Grammar
How to Use “phototroph” in a Sentence
X is a phototrophPhototrophs require YThe phototroph Z obtains energy fromVocabulary
Collocations
Examples
Examples of “phototroph” in a Sentence
verb
British English
- No verb form
American English
- No verb form
adverb
British English
- No adverb form
American English
- No adverb form
adjective
British English
- The phototrophic bacteria flourished in the illuminated tank.
- Phototrophic nutrition differs fundamentally from heterotrophic modes.
American English
- Phototrophic organisms dominated the sunlit surface waters.
- The phototrophic process requires specific pigments.
Usage
Meaning in Context
Business
Not used
Academic
Used in biology, ecology, and environmental science papers
Everyday
Virtually never used in casual conversation
Technical
Standard term in microbiology, botany, and biochemistry
Vocabulary
Synonyms of “phototroph”
Strong
Neutral
Weak
Vocabulary
Antonyms of “phototroph”
Watch out
Common Mistakes When Using “phototroph”
- Misspelling as 'phototrope' (different meaning)
- Confusing with 'phototropic' (growing toward light)
- Using in non-biological contexts
FAQ
Frequently Asked Questions
Most plants are phototrophs, but some parasitic plants (like dodder) have lost photosynthetic ability and obtain nutrients from host plants.
Photoautotrophs are a subset of phototrophs that use light energy AND carbon dioxide as their carbon source. Some phototrophs might use organic carbon compounds.
Obligate phototrophs require light; facultative phototrophs can use alternative energy sources in darkness.
No, humans are heterotrophs—we obtain energy by consuming organic compounds from other organisms.
An organism that obtains energy from light.
Phototroph is usually scientific/technical in register.
Phototroph: in British English it is pronounced /ˈfəʊ.təʊ.trəʊf/, and in American English it is pronounced /ˈfoʊ.toʊ.troʊf/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “No established idioms”
Learning
Memory Aids
Mnemonic
PHOTO (like photograph, needs light) + TROPH (like trophy, needs nourishment) = light-feeder
Conceptual Metaphor
LIGHT IS FOOD/SUN AS ENERGY SOURCE
Practice
Quiz
Which characteristic is essential for all phototrophs?