(colloquial) Alternative form of double dog dare

(colloquial) Alternative form of double dog dare

(colloquial) Alternative form of double dog dare

present participle of double dog dare

present participle of double-dog-dare

present participle of double-dog dare

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.

(psychology) An effect observed in fighter aircraft pilots, where horizontal acceleration at more than 1 standard gravity causes extreme stimulation of the vestibular system and leads to the faulty perception that the aircraft is climbing.