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
Magnesium is a critical part of chlorophyll, which plants need to turn energy from the sun into energy.
—
Leanne Potts, Better Homes & Gardens, 27 Aug. 2025
This shift reflects the breakdown of chlorophyll and rise in carotenoids, which signal that sweetness is developing.
—Sherri Gordon, Health, 25 Aug. 2025
In his clinic, Murthy blends functional medicine with Ayurvedic practices and likes to pair protein-rich foods with dark, leafy vegetables like Moringa and curry leaves for their iron and chlorophyll.
—Morgan Fargo, Vogue, 20 Aug. 2025
Depending on moisture and temperature levels, the next few weeks of August are critical to signal how early trees will begin to lose chlorophyll from their leaves and change color.
—Stephen Underwood, Hartford Courant, 19 Aug. 2025
See All Example Sentences for chlorophyll
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Leanne Potts, Better Homes & Gardens, 27 Aug. 2025
This shift reflects the breakdown of chlorophyll and rise in carotenoids, which signal that sweetness is developing.
—Sherri Gordon, Health, 25 Aug. 2025
In his clinic, Murthy blends functional medicine with Ayurvedic practices and likes to pair protein-rich foods with dark, leafy vegetables like Moringa and curry leaves for their iron and chlorophyll.
—Morgan Fargo, Vogue, 20 Aug. 2025
Depending on moisture and temperature levels, the next few weeks of August are critical to signal how early trees will begin to lose chlorophyll from their leaves and change color.
—Stephen Underwood, Hartford Courant, 19 Aug. 2025
See All Example Sentences for chlorophyll
Cite this Entry
“Chlorophyll.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chlorophyll. Accessed 6 Sep. 2025.
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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