Absorbed rays indicate dense material such as steel.

FORBES: Technology

Michie's Whale Skull Bone will be made using a metal framework inside a carved dense polystyrene material which is then coated in reinforced concrete.

BBC: Sculptures selected for Dunnet Head and beach

The sleek black interior is matched with pre-fitted, dense noise absorbing material on the side panels, efficiently absorbing noise and vibrations.

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Medieval language is dense with abbreviations, because writing material was expensive and books could be published only by copying.

WSJ: David Gelernter: The Pros and Cons of Cyber-English

They shed bubbles of material at speeds of thousands of miles per second, which collide with surrounding dense clouds of hydrogen.

CNN: Stellar nursery in nearby galaxy teems with activity