the.com/witch hat

means The tall, pointed cone shape used in geometry and design — and worn, in popular imagination, by witches on Halloween.

from The shape's name simply borrows the familiar silhouette of a witch's hat — the conical, wide-brimmed headgear that became fixed in Western imagery around witches by the 1800s, largely through illustration and stage costume rather than any documented historical practice. Geometers and designers later adopted 'witch hat' informally as a descriptive nickname for cone or spire shapes that taper to a point, because the resemblance was too obvious to resist naming.