* Set - One of a variety of token sets that have combined effects, such Might Set, Viper Strike Set, Templar Set, Redoubt Set
AC - Activity Coordinator, high level volunteer (not Armor Class, see below)
"Coach" - The volunteer who you first encounter who puts together the party card in the "coaching area"
"Combat (dungeon)" - A configuration of an adventure more aimed at combat
Eldritch 2/3 piece - A set bonus achieved by equipping 2 or 3 Eldritch tokens
Fighters - Either of the Dwarf Fighter or Fighter character classes.
GHC - Gamehole Con - a place where True Dungeon sometimes presents.
LoDS - Lenses of Divine Sight - UR Cleric/Druid eye slot item that doubles the target of healing spells
LoS - Lucas Oil Stadium - where True Dungeon is located at Gen Con
PyP - Pick your purple: A sales offer where for a fixed amount of money, you have your choice of any in print UR.
"Puzzle (dungeon)" - A configuration of an adventure more aimed at puzzles.
Room - Each dungeon is divided into a number of "rooms" - which thematically could be a lava cavern, a forest, or a... room.
SoTS - Shield of the Scholar token
Storyscape - A free to enter themed area where players can meet up, trade tokens, etc.
Surtr's - Surtr's Girdle of Fire Giant Strength token
TD - True Dungeon
TDb - Token Database / tokendb.com
TDC - True Dungeon Celebration - A special presentation of TD in 2017
"The Lute" / WML - Widseth's Mystical Lute - UR bard token allowing for bardsong and melee or ranged attack
Training area - After coaching, players go to a training area where they get some instruction on how to play
True Realm - A special set of activities related to TD presented outside of Gen Con in ??? a long time ago.
UR - Ultra Rare - purple backed tokens of ultra rarity (1 per 100 packs)
(UR)TE - (Ultra Rare) Treasure Enhancer - An (ultra rare) token that grants bonuses to treasure draws
VSF - +2/3 or 5 Viper Strike Fang token
Wizards - Either of the Human Wizard or Elf Wizard character classes.
And a bunch of not-TD specific stuff:
The D&D stat names: STR, DEX, CON, WIS, CHA, INT
The D&D save names: RF(L)X, FORT, WILL
AC - Armor class (not Activity Coordinator, see above)
HP - Hit points
RD - Retribution damage
DM - Dungeon Master
NPC - Non player character