granum

American  

[grey-nuhm] / ˈgreɪ nəm /

noun

grana plural

1. (in prescriptions) a grain.

2. Botany. one of the structural units of a chloroplast in vascular plants, consisting of layers of thylakoids.

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granum Scientific  

/ grā′nəm /

grana plural

1. A stacked membranous structure within the chloroplasts of plants and green algae that contains the chlorophyll and is the site of the light reactions of photosynthesis. The saclike membranes that make up grana are known as thylakoids.

2. See more at chloroplast

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Other Word Forms

Noun Inflected Forms

• grana
  plural

Etymology

Origin of granum

From Latin

Example Sentences

From two Latin words, "filum," a thread, and "granum," a grain. otto-of-roses.

From Stories from Tagore by Tagore, Rabindranath

Bis denum Rutæ folium, salis et breve granum, Juglandesque duas, totidem cum corpore ficus; Hæc oriente die, parco conspersa Lycæo, Sumebat, metuens dederat quæ pocula mater.

From Curiosities of Medical Experience by Millingen, J. G. (John Gideon)

Southward we again find many representatives crossing over to North Africa, among which Helix lenticula has a similar range to Pupa granum, which I have just referred to.

From The History of the European Fauna by Scharff, Robert Francis

The word, which is usually derived from the Lat. filum, thread, and granum, grain, is not found in Ducange, and is indeed of modern origin.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 3 "Fenton, Edward" to "Finistere" by Various

In agro Casinate et Venafro in loco bono parti octava corbi dividat, satis bono septima, tertio loco sexta; si granum modio dividet, parti quinta.

From A History of Rome During the Later Republic and Early Principate by Greenidge, A. H. J. (Abel Hendy Jones)