chloroplast
[ klawr-uh-plast, klohr- ]
/ ˈklɔr əˌplæst, ˈkloʊr- /
noun Botany.
a plastid containing chlorophyll.
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Origin of chloroplast
First recorded in 1885–90; chloro(phyll) + -plast
OTHER WORDS FROM chloroplast
chlo·ro·plas·tic, adjectiveWords nearby chloroplast
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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British Dictionary definitions for chloroplast
chloroplast
/ (ˈklɔːrəʊˌplæst) /
noun
a plastid containing chlorophyll and other pigments, occurring in plants and algae that carry out photosynthesis
Derived forms of chloroplast
chloroplastic, adjectiveCollins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for chloroplast
chloroplast
[ klôr′ə-plăst′ ]
A plastid in the cells of green plants and green algae that contains chlorophylls and carotenoid pigments and creates glucose through photosynthesis. In plants, chloroplasts are usually disk-shaped and can reorient themselves in the cell to vary their exposure to sunlight. Chloroplasts contain the saclike membranes known as thylakoids, which contain the chlorophyll and are arranged in stacklike structures known as grana. Besides conducting photosynthesis, plant chloroplasts store starch and are involved in amino acid synthesis. Like mitochondria, chloroplasts have their own DNA that is different from the DNA in the nucleus, and chloroplasts are therefore believed to have evolved from symbiont bacteria, their DNA being a remnant of their past existence as independent organisms. See more at cell photosynthesis.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for chloroplast
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.