hedgehog

A small mammal of the subfamily Erinaceinae, characterized by their spiny back and often by the habit of rolling up into a ball when attacked, native to Afro-Eurasia.

Any of several spiny mammals, such as the porcupine, that are similar to the hedgehog.

Ellipsis of Czech hedgehog (“an antitank obstacle constructed from three steel rails”).

A spigot mortar-type of depth charge weapon from World War II that simultaneously fires a number of explosives into the water to create a pattern of underwater explosions intended to attack submerged submarines.

A type of chocolate cake (or slice), somewhat similar to an American brownie.

A form of dredging machine.

Medicago intertexta, the pods of which are armed with short spines.

Retzia capensis of South Africa.

The edible fungus Hydnum repandum.

A kind of electrical transformer with open magnetic circuit, the ends of the iron wire core being turned outward and presenting a bristling appearance.