WordReference Random House Unabridged Dictionary of American English © 2026
thy•la•koid
(thī′lə koid′),USA pronunciation n. [Cell Biol.]
- Cell Biologya 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.
- Greek thȳlakoeidé̄s resembling a bag, equivalent. to thý̄lak(os) sack + -oēidēs -oid
- German Thylakoid
- 1965–70