Any of various cacti of the genera Pediocactus, Echinocereus, and Echinopsis.

Any of various cacti of the genus Echinocactus.

plural of hedgehog thistle

Synonym of hederacoside

Any of a group of saponins present in an extract of Hedera

(historical) An important Danish Viking Age (8th to the 11th centuries) trading settlement.

The spiny evergreen flowering plant Erinacea anthyllis. / A species of medick, having the pods spirally twisted and rolled up into a spiny ball.

plural of hedgehog plant

(graph theory) A conjecture concerning the connection between graph coloring and the tensor product of graphs. A counterexample was found in 2019.

(simile, UK, informal, humorous) To look extremely disheveled.