[ grey-nuhm ]
/ ˈgreɪ nəm /
noun, plural gra·na [grey-nuh]. /ˈgreɪ nə/.
(in prescriptions) a grain.
Botany. one of the structural units of a chloroplast in vascular plants, consisting of layers of thylakoids.
THINK YOU’VE GOT A HANDLE ON THIS US STATE NICKNAME QUIZ?
Did you ever collect all those state quarters? Put them to good use on this quiz about curious state monikers and the facts around them.
Question 1 of 8
Mississippi’s nickname comes from the magnificent trees that grow there. What is it?
Origin of granum
Words nearby granum
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for granum
The Spanish name grana, confounded with granum, may have given rise to this contest.
Scientific definitions for granum
[ grā′nəm ]
Plural grana (grā′nə)
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. See more at chloroplast.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.