thylakoid

noun thy·la·koid \ ˈthī-lə-ˌkȯid \

Definition of thylakoid

: any of the membranous disks of lamellae within plant chloroplasts that are composed of protein and lipid and are the sites of the photochemical reactions of photosynthesis

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Origin and Etymology of thylakoid

International Scientific Vocabulary thylak- (from Greek thylakos sack) + -oid


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