A celestial phenomenon with the appearance of such a body.
A small Solar System body consisting mainly of volatile ice, dust and particles of rock whose very eccentric solar orbit periodically brings it close enough to the Sun that the ice vaporises to form an atmosphere, or coma, which may be blown by the solar wind to produce a visible tail.
Any of several species of hummingbird found in the Andes.
A flickering light or lantern, especially over bogs, swamps or marshes, held by a supernatural creature who uses it to lure travelers at night to their demise.
A delusionary or otherwise unachievable goal that one feels compelled to pursue.