Non-biological factor (such as sunlight), material (such as sulfur dioxide), or process (such as hydrolysis) which can affect living or non-living constituents of an ecosystem. Opposite of biotic.

Use abiotic in a sentence

  • The sludge, which the students thought was a fungus, actually turned out to be an abiotic mixture of chemicals from the chemical plant up the river.

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  • Everytime that Steve walked outside after spending all day inside studying his textbooks, he always had an abiotic reaction to the sunlight.

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  • A lack of normal gravity is an abiotic phenomena that causes weakened bones, diminished muscle mass, and disorientation in astronauts.

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