[ al-yuh-rohn, uh-loo r-ohn ]
/ ˈæl yəˌroʊn, əˈlʊər oʊn /

noun (in the seeds of cereal plants)

protein granules (aleurone grains) found in a single layer of cells (aleurone layer) in the outermost portion of the endosperm.
Also al·eu·ron [al-yuh-ron, uh-loo r-on] /ˈæl yəˌrɒn, əˈlʊər ɒn/.

Origin of aleurone

First recorded in 1865–70, aleurone is from the Greek word áleuron flour, meal

Related forms

al·eu·ron·ic [al-yoo-ron-ik] /ˌæl yʊˈrɒn ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for aleurone layer

aleurone layer

aleuron (əˈlʊərɒn, -rən)

/ (əˈlʊərən, -rəʊn) /


the outer protein-rich layer of certain seeds, esp of cereal grains

Word Origin for aleurone layer

C19: from Greek aleuron flour
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012