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 (pôr′tə-bĕl′ō) or por·ta·bel·la (-bĕl′ə) or por·to·bel·la (-bĕl′ə)
n. pl. por·to·bel·los or por·ta·bel·las
A mature, dark-brown form of the common cultivated mushroom (Agaricus bisporus).

[Origin unknown.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -los
(Plants) a large flat-capped edible mushroom
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in classic literature ?
She's been at Madagascar, and at Malabar, and Surinam, and Providence, and Portobello. She was at the fishing up of the wrecked plate ships.
Mr Sibbald, 48, disappeared from his home in Portobello, near Edinburgh, last October.
Two members of the public made the grim discovery near Portobello Promenade at around 6.30am yesterday.
Government watchdogs were impressed with standards at Portobello Primary, in Birtley, Gateshead.
Billy, 48, went missing from his Portobello home near Edinburgh on October 8 last year.
Annette Richardson was walking her dog at the Seafield end of Portobello Beach in http://www.edinburghnews.scotsman.com/news/video-edinburgh-woman-captures-footage-of-dolphins-swimming-off-portobello-coast-1-4919888And a pod was also spotted in the Forth earlier this month, captured https://www.edinburghnews.scotsman.com/news/people/watch-family-s-delight-as-large-pod-of-dolphins-appears-off-edinburgh-coast-1-4983106.
'The Painter' by Banksy first appeared on the corner of Acklam and Portobello Road back in 2008 at the site of the old Falafel King.
The 'beef' is not beef but a large cap of Portobello mushroom.
Inspired by their makeshift home, the mother has been named Portobello - a type of mushroom.
PORTOBELLO 22 BERWICK 47 BERWICK maintained their unbeaten start to the season, making it seven wins and a draw from their first eight East League One games by beating Portobello 47-22.