Noun: portabella ,por-tu'be-lu
- A large, mature variety of the common button mushroom (Agaricus bisporus) with a meaty texture, rich flavour, and broad, flat cap typically 4-6 inches in diameter
"He grilled portabella mushrooms as a vegetarian alternative to burgers";
- portobello
Derived forms: portabellas
Encyclopedia: Portabella