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

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Example Sentences

See Examples For:

oyster mushroom

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

Other edible mushrooms in California that are far more recognizable — and don’t have dangerous lookalikes — include the chicken of the woods, oyster mushroom and honey mushroom, Diaz said.

From Los Angeles Times ● Dec. 10, 2025

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

Professor Peck says that in edible qualities it resembles the oyster mushroom, P. ostreatus.

From Among the Mushrooms A Guide For Beginners by Ellen M. Dallas

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