toadstool

UK: /ˈtəʊdstuːl/ US: /ˈtoʊdˌstul/ ,(tōd′sto̅o̅l′)

WordReference Random House Learner's Dictionary of American English © 2026

toad•stool /ˈtoʊdˌstul/   n. [countable]

1. Fungi a kind of mushroom with an umbrellalike cap.
2. Fungi a poisonous mushroom, as distinguished from one that can be eaten.

WordReference Random House Unabridged Dictionary of American English © 2026

toad•stool  (tōd′sto̅o̅l′), n. 

1. Fungi any of various mushrooms having a stalk with an umbrellalike cap, esp. the agarics.
2. Fungi a poisonous mushroom, as distinguished from an edible one.
3. Fungi any of various other fleshy fungi, as the puffballs and coral fungi.

• Middle English tadstol. See toad, stool 1350–1400

Collins Concise English Dictionary © HarperCollins Publishers::

toadstool / ˈtəʊdˌstuːl/ noun

1. (not in technical use) any basidiomycetous fungus with a capped spore-producing body that is not edible
   Compare mushroom1a

Etymology: 14th Century: from toad + stool