Stellated dodecahedron

/stˈɛleɪtɪd dəʊdˌɛkɐhˈiːdɹən/

/stˈɛleɪɾᵻd doʊdˌɛkɐhˈiːdɹən/

a three-dimensional geometric shape formed by extending the faces of a regular dodecahedron to create additional triangular faces or spikes