granum

G2R1A1N1U1M3

noun

A stack-like structure in plant chloroplasts that contain chlorophyll; the site of photosynthesis.

OriginLatin grānum →
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Meanings

granum1

noungranum (plural grana)

plural grana

  1. biologyA stack-like structure in plant chloroplasts that contain chlorophyll; the site of photosynthesis.

granum2

noungranum (plural granums)

plural granums · alternative grannum

  1. obsoleteregionalOne's grandmother.

    Each of 'em has a ſev'ral Gin, / To catch Intelligences in. / Some by the Noſe vvith fumes trapan 'em, / As Dunſtan did the Devil's Grannum.

    1663 (indicated as 1664), [Samuel Butler], “Canto III”, in Hudibras. The Second Part. […], London: […] T[homas] R[oycroft] for John Martyn, and James Allestry […], →OCLC, page 175

Synonyms & antonyms

Also see
grandmother

Origin

  1. Latingrānum“grain, seed or small kernel”
  2. Englishgranum

From the late 19th c., from Latin grānum (“grain, seed or small kernel”). Doublet of corn, grain, gram, and grao.

More words from Latin

Full word history & related roots →
Cite this entry
APA

granum. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/granum

MLA

“granum.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/granum. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “granum,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/granum.

Source: granum on Wiktionary, CC BY-SA 4.0.