Chlorophyll a
Chlorophyll Chlo"ro*phyll, n. [Gr. chlwro`s light green + fy`llon leaf: cf. F. chlorophylle.] 1. (Bot.) Literally, leaf green; a green granular matter formed in the cells of the leaves (and other parts exposed to light) of plants, to which they owe their green color, and through which all ordinary assimilation of plant food takes place. Similar chlorophyll granules have been found in the tissues of the lower animals. [Written also {chlorophyl}.] [1913 Webster]

2. any of a group of green pigments found in photosynthetic organisms. {Chlorophyll a} and {chlorophyll b} are found in higher plants and green algae; {chlorophyll c} is found in certain types of marine algae. Chemically, it has a porphyrin ring with a magnesium ion bound to the four central nitrogens, and has a phytyl side chain. It is essential for photosynthesis in most plants. {Chlorophyll a} has formula {C55H72N4O5Mg}.

Syn: chlorophyll. [WordNet 1.5]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Chlorophyll a — Chlorophyll Chlo ro*phyll, n. [Gr. chlwro s light green + fy llon leaf: cf. F. chlorophylle.] 1. (Bot.) Literally, leaf green; a green granular matter formed in the cells of the leaves (and other parts exposed to light) of plants, to which they… …   The Collaborative International Dictionary of English

  • Chlorophyll — Chlo ro*phyll, n. [Gr. chlwro s light green + fy llon leaf: cf. F. chlorophylle.] 1. (Bot.) Literally, leaf green; a green granular matter formed in the cells of the leaves (and other parts exposed to light) of plants, to which they owe their… …   The Collaborative International Dictionary of English

  • chlorophyll b — Chlorophyll Chlo ro*phyll, n. [Gr. chlwro s light green + fy llon leaf: cf. F. chlorophylle.] 1. (Bot.) Literally, leaf green; a green granular matter formed in the cells of the leaves (and other parts exposed to light) of plants, to which they… …   The Collaborative International Dictionary of English

  • chlorophyll c — Chlorophyll Chlo ro*phyll, n. [Gr. chlwro s light green + fy llon leaf: cf. F. chlorophylle.] 1. (Bot.) Literally, leaf green; a green granular matter formed in the cells of the leaves (and other parts exposed to light) of plants, to which they… …   The Collaborative International Dictionary of English

  • Chlorophyll — Leaf green redirects here. For the video game, see Pokémon FireRed and LeafGreen. Chlorophyll gives leaves their green color and absorbs light that is used in photosynthesis …   Wikipedia

  • chlorophyll — noun Etymology: French chlorophylle, from chlor + Greek phyllon leaf more at blade Date: 1819 1. the green photosynthetic pigment found chiefly in the chloroplasts of plants and occurring especially as a blue black ester C55H72MgN4O5 or a dark… …   New Collegiate Dictionary

  • To turn over a new leaf — Leaf Leaf (l[=e]f), n.; pl. {Leaves} (l[=e]vz). [OE. leef, lef, leaf, AS. le[ a]f; akin to S. l[=o]f, OFries. laf, D. loof foliage, G. laub, OHG. loub leaf, foliage, Icel. lauf, Sw. l[ o]f, Dan. l[ o]v, Goth. laufs; cf. Lith. lapas. Cf. {Lodge}.] …   The Collaborative International Dictionary of English

  • Thylakoid — A Thylakoid is a membrane bound compartment inside chloroplasts and cyanobacteria. They are the site of the light dependent reactions of photosynthesis. The word thylakoid is derived from the Greek thylakos , meaning sac . Thylakoids consists of… …   Wikipedia

  • Photosynthetic pigment — A photosynthetic pigment (accessory pigment; chloroplast pigment; antenna pigment) is a pigment that is present in chloroplasts or photosynthetic bacteria and captures the light energy necessary for photosynthesis. Plants Green plants have five… …   Wikipedia

  • C55H72N4O5Mg — Chlorophyll Chlo ro*phyll, n. [Gr. chlwro s light green + fy llon leaf: cf. F. chlorophylle.] 1. (Bot.) Literally, leaf green; a green granular matter formed in the cells of the leaves (and other parts exposed to light) of plants, to which they… …   The Collaborative International Dictionary of English

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