A form of solo exercise, involving throwing punches at the air, and not at an opponent.

present participle of shadowbox

In British and some Commonwealth parliaments, a member of an opposition party, with responsibility for a particular portfolio.

An experimental platform that simulates earthquake motion to verify seismic performance of building structures.

A cultural movement combining technology, electronic dance music and spiritual or religious elements.

plural of shadow minister

(slang) what is happening?; what's up?

A rock formation in the Canadian Rockies that contains very many fossils from the Cambrian period.

(geology) A dark, muddy rock, rich in sulfides and organic material.

An untanned leather, often dyed green; originally made from horse skin, today mostly made from the skin of a shark or ray. / (entomology) A rough or spiny surface of an insect's cuticle.