Definition of grana in English:


Line breaks: grana
Pronunciation: /ˈgrɑːnə
, ˈgreɪnə/

noun (singular granum)

  • The stacks of thylakoids embedded in the stroma of a chloroplast.
    More example sentences
    • Chloroplast envelopes, stacked grana and unstacked stroma thylakoids were well-defined.
    • The chloroplasts with large grana stacks were seen in 50% of cases but none of the parameters significantly explained the occurrence.
    • The VPC chloroplasts possessed well-developed thylakoids with grana.


late 19th century: plural of Latin granum 'grain'.

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elaborate ornamentation of a vocal melody