# absorptiometer

CEFR C2 · Noun

Source: https://englishreference.com/word/absorptiometer
Updated: 2026-05-18

## Definition

a scientific tool used to measure how much light or radiation is absorbed by a material. It helps scientists understand how different substances interact with light.

For teachers: an instrument designed to measure the degree to which a substance absorbs electromagnetic radiation, such as light or X-rays. Often used in spectroscopy to determine the concentration of a chemical in a solution.

## Examples

- The scientist used an absorptiometer to test the sample.
- Researchers placed the new solar panel in front of an absorptiometer to measure how much sunlight it could capture.
- By analyzing the data from the absorptiometer, the team was able to identify the specific wavelengths of light that the plant's leaves were most efficient at absorbing.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.