chlorophyll

noun

chlo·​ro·​phyll ˈklȯr-ə-ˌfil How to pronounce chlorophyll (audio)
-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
chlorophyllous adjective

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Example Sentences

Recent Examples on the Web But production of chlorophyll isn’t the same year round. Shanti Lerner, The Arizona Republic, 16 Sep. 2022 Chlorophyll, which is the chemical that gives many trees their green pigment, absorbs sunlight, but as days shorten, chlorophyll production stops and trees begin to stop. Claire Rafford, The Indianapolis Star, 16 Sep. 2022 That's when the green pigment known as chlorophyll fades, allowing all the beautiful reds, oranges, and yellows to show. Savanna Bous, Better Homes & Gardens, 7 Sep. 2022 As the amount of daylight decreases and temperatures drop, trees slow their production of chlorophyll, which gives leaves their green color. Chelsey Lewis, Journal Sentinel, 2 Sep. 2022 Pistachios contain a unique makeup of powerful antioxidant compounds, including tocopherols, phylloquinone, carotenoids, chlorophyll and flavonoids. Stefani Sassos, Ms, Rdn, Cso, Cdn, Nasm-cpt, Good Housekeeping, 16 June 2022 Any perishable fruit or vegetable that is not cooled within a few hours of harvest will have already burned through much of its bounty of complex sugars, chlorophyll, Vitamin C, and other nutrients. Nicola Twilley, The New Yorker, 15 Aug. 2022 These colorways encourage photosynthesis in plants and chlorophyll absorption. Kelly Allen, House Beautiful, 8 Aug. 2022 These waters are richer in chlorophyll, allowing plankton to bloom, which also draws in bait fish. Katie Hunt, CNN, 28 July 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'chlorophyll.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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Word History

Etymology

French chlorophylle, from chlor- + Greek phyllon leaf — more at blade

First Known Use

1819, in the meaning defined at sense 1

Time Traveler
The first known use of chlorophyll was in 1819

Dictionary Entries Near chlorophyll

Cite this Entry

“Chlorophyll.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chlorophyll. Accessed 30 Sep. 2022.

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Kids Definition

chlorophyll

noun

chlo·​ro·​phyll ˈklȯr-ə-ˌfil How to pronounce chlorophyll (audio)
: the green coloring matter found mainly in the chloroplasts of plants that absorbs energy from sunlight to produce carbohydrates from carbon dioxide and water during photosynthesis

Medical Definition

chlorophyll

noun

chlo·​ro·​phyll ˈklōr-ə-ˌfil, ˈklȯr-, -fəl How to pronounce chlorophyll (audio)
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

More from Merriam-Webster on chlorophyll

Last Updated: 20 Sep 2022

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