plural of dark market

Synonym of darknet market / Used other than figuratively or idiomatically: see dark, market.

plural of after dark

Synonym of oh dark thirty

past participle of go dark

(astronomy, meteorology, geology) The portion of the flight of a meteor, after its incandescent fireball phase, when the space rock has cooled down and slowed down, so that it is no longer glowing, but still in flight, and yet to crash onto the ground.

(astronomy, cosmology) A linked phenomenon conjectured to explain dark matter and dark energy as different manifestations of the same underlying laws of gravity.

(physics) A state of hydrogen that is poorly electrically conductive (much less conductive than metallic hydrogen).

Alternative form of dark fibre

Unused optical fibre that is available for use