the umbrella-like head of a mushroom or other fungus; pileus; also called cap
We put sausage stuffing in the mushroom caps.
[muhsh-room, -roo m] /ˈmʌʃ rum, -rʊm/ noun 1. any of various fleshy fungi including the toadstools, puffballs, coral fungi, morels, etc. 2. any of several edible species, especially of the family Agaricaceae, as Agaricus campestris (meadow mushroom or field mushroom) cultivated for food in the U.S. 3. anything of similar shape or correspondingly rapid growth. […]
noun 1. (def 4). noun 1. the large mushroom-shaped cloud of dust, debris, etc produced by a nuclear explosion
noun 1. a ventilator having at the top of a vertical shaft a broad rounded cap that can be screwed down to close it.
noun 1. beamless reinforced-concrete floor and roof construction employing columns with widely flaring heads having horizontal rings of reinforcement to support the floor or roof slab.