deliquium

noun4

1. •
   An abrupt loss of consciousness usually caused by an insufficient blood flow to the brain; fainting.

   • If he be locked in a close room, he is afraid of being stifled for want of air, and still carries biscuit, aquavitae, or some strong waters about him, for fear of deliquiums, or being sick […] — 1624
2. •
   Liquefaction through absorption of moisture from the air.
3. •
   (literary, figurative) A languid, maudlin mood.
4. •
   (rare) An abrupt absence of sunlight, e.g. caused by an eclipse.