Hunters and monsters have vocabularies that are all their own. If there are terms that confuse you, check here. You'll be talking the lingo in no time.
(Following each definition will be a reference for the origin of the term if known, author first, then the title of the work or serise.)
Pomme de Sang - French for Apple of Blood. Used by vampires to refer to a person, either mortal or shapeshifter, from whom the vampire feeds on a regular basis. A Pomme de Sang is not just any meal, but holds a position closer to that of a lover. (Laurell Hamilton, Anita Blake)
Quincunx - Also called a five-spot, this Latin word is used to describe the patern of five pips occuring on the 5 side of a die or the 5 card of a standard card deck
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In American hoodoo - "The quincunx or five-spot is not generally used for disposing of the left-overs from spell-work; rather it is for sealing and fixing spells in place. Deposits are made at the four corners and also in the center. The nature of these deposits varies based on the elements used in the spell and the type of floor in the building. Wooden floor boards or bricks may be lifted and bulky elements such as bundles or bottles laid beneath them. If the floor cannot be disturbed, items may be hidden at floor-level behind furniture. Alternatively, small piles of graveyard dirt, perfumed sachet powders, or powdered minerals such as bluestone, common table salt, or saltpeter may be laid down in inconspicuous piles directly on the floor or carpet. The quincunx is also used when drawing so-called crossing marks with chalk, either to harm an enemy or as part of a protection spell. " (quote from http://www.luckymojo.com/layingtricks.html)
Summon - To call a spirit or demon by use of a ritual. The summoned entity is usually called to do a service for the person doing the summoning. Summoning demons is a particularly nasty and dangerous practice, often ending in the summoner being eaten or dragged screaming into hell.