granum

noun

gra·​num ˈgrā-nəm 

plural grana ˈgrā-nə 

: one of the lamellar stacks of chlorophyll-containing thylakoids found in plant chloroplasts

Examples of granum in a Sentence

Recent Examples on the Web

Originally, granum referred to individual seeds or kernels of cereal plants, but its meaning expanded to include small particles, measurements (like grains of salt or sand), and even textures in materials (like wood grain). —Erik Kain, Forbes, 2 Oct. 2024

Word History

Etymology

New Latin, from Latin, grain — more at corn

First Known Use

1894, in the meaning defined above

Kids Definition

granum

noun

gra·​num ˈgrā-nəm 

plural grana -nə 

: one of the stacks of chlorophyll-containing material in plant chloroplasts

Medical Definition

granum

noun

gra·​num ˈgrā-nəm  ˈgrä-nəm 

plural grana -nə 

: one of the lamellar stacks of chlorophyll-containing material in plant chloroplasts