chlorophyll
noun
chlo·ro·phyll
ˈklȯr-ə-ˌfil 
-fəl
1
: the green photosynthetic pigment found chiefly in the chloroplasts of plants and occurring especially as a blue-black ester C55H72MgN4O5 or a dark green ester C55H70MgN4O6
called also respectively chlorophyll a, chlorophyll b
2
: a waxy green chlorophyll-containing substance extracted from green plants and used as a coloring agent or deodorant
Examples of chlorophyll in a Sentence
Recent Examples on the Web
This cues plants to reduce photosynthesis for the season, decreasing chlorophyll, or the green pigment in leaves.
—
Hayleigh Evans, The Arizona Republic, 23 Oct. 2024
Read More: Why Some Plants Close Their Leaves at Night
Where Does Photosynthesis Take Place?
Plant cells are filled with organelles called chloroplasts, which are, in turn, filled with a pigment called chlorophyll (the same one that gives plants their green color).
—Cody Cottier, Discover Magazine, 4 Nov. 2024
In plants, this element is linked to chlorophyll, which gives them their greenness.
—Geraldine Castro, WIRED, 1 Nov. 2024
Between the lines: The green color in leaves comes from chlorophyll, the pigment that helps plants turn sunlight into energy via photosynthesis.
—Worth Sparkman, Axios, 22 Oct. 2024
See all Example Sentences for chlorophyll 
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Hayleigh Evans, The Arizona Republic, 23 Oct. 2024
Read More: Why Some Plants Close Their Leaves at Night
Where Does Photosynthesis Take Place?
Plant cells are filled with organelles called chloroplasts, which are, in turn, filled with a pigment called chlorophyll (the same one that gives plants their green color).
—Cody Cottier, Discover Magazine, 4 Nov. 2024
In plants, this element is linked to chlorophyll, which gives them their greenness.
—Geraldine Castro, WIRED, 1 Nov. 2024
Between the lines: The green color in leaves comes from chlorophyll, the pigment that helps plants turn sunlight into energy via photosynthesis.
—Worth Sparkman, Axios, 22 Oct. 2024
See all Example Sentences for chlorophyll
Dictionary Entries Near chlorophyll
Cite this Entry
“Chlorophyll.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chlorophyll. Accessed 1 Dec. 2024.
Copy CitationKids Definition
chlorophyll
noun
chlo·ro·phyll
ˈklōr-ə-ˌfil
ˈklȯr-,
-fəl
: the green coloring matter that is found chiefly in the chloroplasts of plants and is necessary for photosynthesis
Medical Definition
chlorophyll
noun
chlo·ro·phyll
ˈklōr-ə-ˌfil, ˈklȯr-, -fəl
1
: the green photosynthetic coloring matter of plants found in chloroplasts and made up chiefly of a blue-black ester C55H72MgN4O5 and a dark green ester C55H70MgN4O6
called also respectively chlorophyll a, chlorophyll b
2
: a waxy green chlorophyll-containing substance extracted from green plants and used as a coloring agent or deodorant
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