oyster mushroom

American  

noun

1. oyster cap.

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oyster mushroom British  

noun

1. an edible fungus, Pleurotus ostreatus, having an oyster-shaped cap, commonly found growing in clusters on the trunks of broad-leaved trees

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Etymology

Origin of oyster mushroom

First recorded in 1870–75

Example Sentences

Although it is an attractive and edible species, the golden oyster mushroom has demonstrated its ability to escape cultivation and establish itself in the wild, where it can outcompete native fungi.

From Science Daily • Apr. 24, 2026

The oyster mushroom produces chemicals to paralyze its nematode prey within a few minutes of contact.

From National Geographic • Dec. 12, 2023

But fungi, too, have an appetite for flesh, and it’s not just the oyster mushroom, although it is the only carnivorous fungus you’ll generally find in your grocery store.

From New York Times • Jan. 18, 2023

The final touch is a spoonful of translucent green algae “caviar” placed into the divot of each yellow oyster mushroom cap.

From Los Angeles Times • Jan. 5, 2023

Otherwise they were canned as the Tricholoma and oyster mushroom.

From The Mushroom, Edible and Otherwise Its Habitat and its Time of Growth by Hard, Miron Elisha