What does autotrophically mean?
Autotrophically is an adverb meaning “in an autotrophic manner.” It describes organisms or processes that manufacture their own organic material from inorganic substances rather than obtaining food from other organisms. The best-known examples are plants, algae, and many cyanobacteria, which use light energy to synthesize organic compounds from carbon dioxide and water; certain microbes instead obtain energy through the oxidation of inorganic chemicals. The word is formal and belongs primarily to biological and ecological writing, so it is more specialized than expressions such as “making their own food.” In ordinary use, “as an autotroph” may sound more natural, but autotrophically usefully emphasizes the mode of nutrition. Its principal opposite is heterotrophically, which describes organisms that depend on preformed organic matter. Autotrophically is also associated with the wider conceptual contrast between self-feeding organisms and consumers, making it useful in discussions of ecosystems, metabolism, and the origins of life.
adverbIn an autotrophic manner; by synthesizing organic compounds from inorganic substances, as autotrophs do.
- In an autotrophic manner, by synthesizing organic compounds from inorganic substances.
"Most plants grow autotrophically, using sunlight to convert carbon dioxide and water into organic matter."
"Cyanobacteria can grow autotrophically by fixing carbon dioxide into organic compounds."
"Unlike the surrounding heterotrophically nourished organisms, these bacteria live autotrophically using energy obtained from inorganic chemical reactions."
Autotrophically is the remarkable way of living that lets plants, algae, and certain microbes turn sunlight—or even chemical energy—into food.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does autotrophically come from?
Autotrophically was formed from autotrophic by adding the adverbial suffix -ly. Autotrophic combines the combining form auto-, from Greek autos meaning “self,” with trophic, derived from Greek trophē meaning “nourishment.” The resulting expression follows the established English pattern for converting an adjective ending in -ic into an adverb ending in -ly. Its close relatives include autotroph, autotrophy, phototroph, and heterotroph, all formed around the shared Greek root for nourishment.
Related word forms
How autotrophically is actually used
This is a formal scientific and ecological adverb, chiefly associated with biology, microbiology, and environmental science. It is less common than the adjective autotrophic or the phrase “in an autotrophic manner.”
Easily confused with autotrophically
Autotrophically describes making organic matter from inorganic sources, whereas heterotrophically describes obtaining food from other organisms or organic material.