thylakoid

American  

[thahy-luh-koid] / ˈθaɪ ləˌkɔɪd /

noun

Cell Biology.

1. 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 Scientific  

/ thī′lə-koid′ /

1. 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.

---

Etymology

Origin of thylakoid

1965–70; < German Thylakoid < Greek thȳlakoeidḗs resembling a bag, equivalent to thȳ́lak ( os ) sack + -oēidēs -oid

Example Sentences

Firstly, the pH value of the medium surrounding the thylakoid membrane reacts highly dynamically to light changes.

From Science Daily • Apr. 8, 2024

This discovery puts into perspective the role of cyanobacteria with thylakoid membranes in early Earth oxygenation.

From Science Daily • Jan. 5, 2024

These structures, called thylakoid membranes, are the oldest ever discovered.

From Science Daily • Jan. 5, 2024

The thylakoid membrane encloses an internal space called the thylakoid lumen.

From Textbooks • Jun. 9, 2022

The hydrogen ions are allowed to pass through the thylakoid membrane through an embedded protein complex called ATP synthase.

From Textbooks • Apr. 25, 2013