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thylakoid
[ thahy-luh-koid ]
noun
, Cell Biology.
- a flattened sac or vesicle lined with a pigmented membrane that is the site of photosynthesis, in plants and algae occurring in interconnected stacks constituting a granum of the chloroplast, and in other photosynthesizing organisms occurring either singly or as part of the cell membrane or other structure.
thylakoid
/ thī′lə-koid′ /
- A saclike membrane that contains the chlorophyll in cyanobacteria and in the chloroplasts of plant cells and green algae. In chloroplasts, thylakoids are arranged in stacks called grana.
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Word History and Origins
Origin of thylakoid1
1965–70; < German Thylakoid < Greek thȳlakoeidḗs resembling a bag, equivalent to thȳ́lak ( os ) sack + -oēidēs -oid
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Example Sentences
When light hits a plant’s leaves, it shines on chloroplasts and into their thylakoid membranes.
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