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

"We want to remind growers that not all cultivated fungi stay where we put them. Once released outdoors, even accidentally, the golden oyster mushroom can spread quickly and outcompete native species," said Jusino.

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 applying the substance to worms made it clear 3-octanone had all the gruesome effects of a brush with an oyster mushroom.

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

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

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