chlorophyll

or chlo·ro·phyl

[ klawr-uh-fil, klohr- ]

/ ˈklɔr ə fɪl, ˈkloʊr- /

noun Botany, Biochemistry.

the green coloring matter of leaves and plants, essential to the production of carbohydrates by photosynthesis, and occurring in a bluish-black form, C55H72MgN4O5(chlorophyll a ), and a dark-green form, C55H70MgN4O6(chlorophyll b ).

Origin of chlorophyll

First recorded in 1810–20; chloro-¹ + -phyll

OTHER WORDS FROM chlorophyll

chlo·ro·phyl·loid, adjective

Words nearby chlorophyll

chloromyeloma, chloronaphthalene, chlorophenol, chlorophenol red, chlorophenothane, chlorophyll, chlorophyllase, chlorophyllous, chlorophyte, chlorophytum, chloropicrin

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for chlorophyll

When the stalk is dried out, it is crushed to extract its green juice (the liquid is green because of chlorophyll in the plant).
Pancakes' New Topper|Stacey Slate|December 8, 2009|DAILY BEAST
The prothallus is a small underground body destitute of chlorophyll.
How to Know the Ferns|S. Leonard Bastin
But it has naturally lost its leaves, for which it has no further use, and it possesses no chlorophyll, as the mistletoe does.
The Evolutionist at Large|Grant Allen
Chlorophyll is the miracle-worker of the vegetable world; it makes the solar power available for life.
Under the Maples|John Burroughs

A green colouring matter, identical with chlorophyll, found in bile, and in the green dejections of children.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley
Even when the plant has some other color than green the chlorophyll is still the real plasmodomous substance.
The Wonders of Life|Ernst Haeckel

British Dictionary definitions for chlorophyll

chlorophyll

US chlorophyl

/ (ˈklɔːrəfɪl) /

noun

the green pigment of plants and photosynthetic algae and bacteria that traps the energy of sunlight for photosynthesis and exists in several forms, the most abundant being chlorophyll a (C 55 H 72 O 5 N 4 Mg): used as a colouring agent in medicines or food (E140)

Derived forms of chlorophyll

chlorophylloid, adjectivechlorophyllous, adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for chlorophyll

chlorophyll

[ (klawr-uh-fil) ]

The complex chemical that gives a plant its green color and plays an important role in the conversion of sunlight into energy for the plant. (See photosynthesis.)

Medical definitions for chlorophyll

chlorophyll

n.

Any of a group of related green pigments found in photosynthetic cells that converts light energy into ATP and other forms of energy needed for biochemical processes; it is found in green plants, brown and red algae, and certain aerobic and anaerobic bacteria.

Scientific definitions for chlorophyll

chlorophyll

[ klôr′ə-fĭl ]

Any of several green pigments found in photosynthetic organisms, such as plants, algae, and cyanobacteria. At its molecular core, chlorophyll has a porphyrin structure but contains a magnesium atom at its center and a long carbon side chain. Chlorophyll absorbs red and blue wavelengths of light, but reflects green. When it absorbs light energy, a chlorophyll molecule enters a higher energy state in which it easily gives up an electron to the first available electron-accepting molecule nearby. This electron moves through a chain of acceptors and is ultimately used in the synthesis of ATP, which provides chemical energy for plant metabolism. Plants rely on two forms of chlorophyll, chlorophyll a (C66H72MgN4O5) and chlorophyll b (C66H70MgN4O6), which have slightly different light absorbing properties. All plants, algae, and cyanobacteria have chlorophyll a, since only this compound can pass an electron to acceptors in oxygen-producing photosynthetic reactions. Chlorophyll b absorbs light energy that is then transferred to chlorophyll a. Several protist groups such as brown algae and diatoms lack chlorophyll b but have another pigment, chlorophyll c, instead. Other closely related pigments are used by various bacteria in photosynthetic reactions that do not produce oxygen. See more at photosynthesis.

Word History

From its name, one might think that chlorophyll has chlorine in it, but it doesn't. The chloro- of chlorophyll comes from the Greek word for green; chlorophyll in fact is the chemical compound that gives green plants their characteristic color. The name of the chemical element chlorine comes from the same root as the prefix chloro-, and is so called because it is a greenish-colored gas.

单词	chlorophyll
释义	chlorophyll or chlo·ro·phyl [ klawr-uh-fil, klohr- ] / ˈklɔr ə fɪl, ˈkloʊr- / noun Botany, Biochemistry. the green coloring matter of leaves and plants, essential to the production of carbohydrates by photosynthesis, and occurring in a bluish-black form, C55H72MgN4O5(chlorophyll a ), and a dark-green form, C55H70MgN4O6(chlorophyll b ). Origin of chlorophyll First recorded in 1810–20; chloro-¹ + -phyll OTHER WORDS FROM chlorophyll chlo·ro·phyl·loid, adjective Words nearby chlorophyll chloromyeloma, chloronaphthalene, chlorophenol, chlorophenol red, chlorophenothane, chlorophyll, chlorophyllase, chlorophyllous, chlorophyte, chlorophytum, chloropicrin Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for chlorophyll When the stalk is dried out, it is crushed to extract its green juice (the liquid is green because of chlorophyll in the plant). Pancakes' New Topper\|Stacey Slate\|December 8, 2009\|DAILY BEAST The prothallus is a small underground body destitute of chlorophyll. How to Know the Ferns\|S. Leonard Bastin But it has naturally lost its leaves, for which it has no further use, and it possesses no chlorophyll, as the mistletoe does. The Evolutionist at Large\|Grant Allen Chlorophyll is the miracle-worker of the vegetable world; it makes the solar power available for life. Under the Maples\|John Burroughs A green colouring matter, identical with chlorophyll, found in bile, and in the green dejections of children. Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I\|Arnold Cooley Even when the plant has some other color than green the chlorophyll is still the real plasmodomous substance. The Wonders of Life\|Ernst Haeckel British Dictionary definitions for chlorophyll chlorophyll US chlorophyl / (ˈklɔːrəfɪl) / noun the green pigment of plants and photosynthetic algae and bacteria that traps the energy of sunlight for photosynthesis and exists in several forms, the most abundant being chlorophyll a (C 55 H 72 O 5 N 4 Mg): used as a colouring agent in medicines or food (E140) Derived forms of chlorophyll chlorophylloid, adjectivechlorophyllous, adjective Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for chlorophyll chlorophyll [ (klawr-uh-fil) ] The complex chemical that gives a plant its green color and plays an important role in the conversion of sunlight into energy for the plant. (See photosynthesis.) The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for chlorophyll chlorophyll n. Any of a group of related green pigments found in photosynthetic cells that converts light energy into ATP and other forms of energy needed for biochemical processes; it is found in green plants, brown and red algae, and certain aerobic and anaerobic bacteria. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for chlorophyll chlorophyll [ klôr′ə-fĭl ] Any of several green pigments found in photosynthetic organisms, such as plants, algae, and cyanobacteria. At its molecular core, chlorophyll has a porphyrin structure but contains a magnesium atom at its center and a long carbon side chain. Chlorophyll absorbs red and blue wavelengths of light, but reflects green. When it absorbs light energy, a chlorophyll molecule enters a higher energy state in which it easily gives up an electron to the first available electron-accepting molecule nearby. This electron moves through a chain of acceptors and is ultimately used in the synthesis of ATP, which provides chemical energy for plant metabolism. Plants rely on two forms of chlorophyll, chlorophyll a (C66H72MgN4O5) and chlorophyll b (C66H70MgN4O6), which have slightly different light absorbing properties. All plants, algae, and cyanobacteria have chlorophyll a, since only this compound can pass an electron to acceptors in oxygen-producing photosynthetic reactions. Chlorophyll b absorbs light energy that is then transferred to chlorophyll a. Several protist groups such as brown algae and diatoms lack chlorophyll b but have another pigment, chlorophyll c, instead. Other closely related pigments are used by various bacteria in photosynthetic reactions that do not produce oxygen. See more at photosynthesis. Word History From its name, one might think that chlorophyll has chlorine in it, but it doesn't. The chloro- of chlorophyll comes from the Greek word for green; chlorophyll in fact is the chemical compound that gives green plants their characteristic color. The name of the chemical element chlorine comes from the same root as the prefix chloro-, and is so called because it is a greenish-colored gas. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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