# granum

> English word · Noun

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

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

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/granum