thy·​la·​koid | \ ˈthī-lə-ˌkȯid How to pronounce thylakoid (audio) \

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

Examples of thylakoid in a Sentence

Recent Examples on the Web Spinach is a source of thylakoids, the chlorophyll-bearing parts of green leaves. Lisa Drayer, CNN, 8 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thylakoid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of thylakoid

1962, in the meaning defined above

History and Etymology for thylakoid

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

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The first known use of thylakoid was in 1962

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Cite this Entry

“Thylakoid.” Dictionary, Merriam-Webster, Accessed 28 Oct. 2021.

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