Definition of "portobello" [portobello]

• A mature, very large cremini mushroom. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I've been familiar with and enjoyed the big, meaty mushrooms called portobello for years, and I had assumed that that was, well, their name."
• "Are you by any chance the same plagiarist as Andrea, who spammed the "portobello" post?"
• "The name "portobello" began to be used in the 1980s as a brilliant marketing ploy to popularize an unglamorous mushroom that, more often than not, had to be disposed of because growers couldn't sell them."