S: (n) Halcyon, genus Halcyon (a large kingfisher widely distributed in warmer parts of the Old World)
S: (n) halcyon (a mythical bird said to breed at the time of the winter solstice in a nest floating on the sea and to have the power of calming the winds and waves)
S: (n) psychopomp (a conductor of souls to the afterworld) "Hermes was their psychopomp"
S: (n) sylph (an elemental being believed to inhabit the air)
S: (n) unicorn (an imaginary creature represented as a white horse with a long horn growing from its forehead)
S: (n) Death (the personification of death) "Death walked the streets of the plague-bound city"
S: (n) Gargantua (a voracious giant in Francois Rabelais' book of the same name)
S: (n) Maxwell's demon (an imaginary creature that controls a small hole in a partition that divides a chamber filled with gas into two parts and allows fast molecules to move in one direction and slow molecules to move in the other direction through the hole; this would result in one part of the container becoming warmer and the other cooler, thus decreasing entropy and violating the second law of thermodynamics)
S: (n) Martian (imaginary people who live on the planet Mars)
S: (n) Humpty Dumpty (an egg-shaped character in a nursery rhyme who fell off a wall and could not be put back together again (late 17th century))