oyster mushroom

American  

noun

1. oyster cap.

---

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

---

Etymology

Origin of oyster mushroom

First recorded in 1870–75

Example Sentences

With its bright yellow, cushion-like caps, the golden oyster mushroom has become a favorite among home growers and food lovers.

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

Here are Mueller’s recommendations for expanding your oyster mushroom kit into two or three kits to grow at home:

From Los Angeles Times • Feb. 1, 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

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