A hedgehog is a small, spiny mammal.
Hedgehog may also refer to: Domesticated hedgehog Hedgehog (band), a Beijing rock band Hedgehog cactus (disambiguation), a common name for Pediocactus, Echinocereus, or Echinopsis Hedgehog plant, Erinacea anthyllis Hedgehog (chess), a pawn formation in chess Hedgehog (weapon), an anti-submarine weapon Czech hedgehog (military), an anti-tank, anti-vehicle obstacle Hedgehog signaling pathway, a signal transduction pathway The Hedgehog, a 2009 French film directed by Mona Achache Hedgehog (EP), an EP by Melt-Banana Hedgehog (film) Hedgehog (geometry), a curve formed as the envelope of lines determined by a support function Hedgehog (hypergraph), a hypergraph formed from a complete graph by adding another vertex to each edge.
See also Hedgehog space, a topological space Hedgehog mushroom (disambiguation), multiple uses Hedgehog defence, a military stratagem Ron Jeremy, nickname "The Hedgehog", actor Hedgehog's dilemma, a philosophical analogy Hedgehog slice, a chocolate cake with biscuit pieces The Hedgehog and the Fox, an essay by the philosopher Isaiah Berlin Sonic the Hedgehog, a video game series Sonic hedgehog protein, a protein playing a key role in vertebrate organogenesis