Ahau — Yucatec Mayan name of the twentieth Tzolkin day sign, the Sun.

Ajq'ij — Quiché Mayan name for a calendar day keeper.

Akbal — Yucatec Mayan name of the third Tzolkin day sign, the House.

Bacab — The gods of the four directions.

Baktun — A calendar period of just under 400 years.

Ben — Yucatec Mayan name of the thirteenth Tzolkin day sign, the Reed.

Bolontiku — The nine lords of the underworld.

Buk Xok — A permutational table of the Tzolkin.

Caban — Yucatec Mayan name of the seventeenth Tzolkin day sign, Earth.

Cahib xalcat be — The four junction roads of Maya mythology.

Cauac — Yucatec Mayan name of the nineteenth Tzolkin day sign, the Storm.

Chicchan — Yucatec Mayan name of the fifth Tzolkin day sign, the Serpent.

Chichén Itzá — Important postclassic city in the Yucatán.

Chik'in — The black western bacab.

Chilam Balam — The order of jaguar priests responsible for prophecy.

Chol'qij — Quiché Mayan word for the 260-day Tzolkin count.

Chuen — Yucatec Mayan name of the eleventh Tzolkin day sign, the Monkey.

Cib — Yucatec Mayan name of the sixteenth Tzolkin day sign, the Vulture.

Cimi — Yucatec Mayan name of the sixth Tzolkin day sign, Death.

Eb — Yucatec Mayan name of the twelfth Tzolkin day sign, the Road.

Etznab — Yucatec Mayan name of the eighteenth Tzolkin day sign, the Mirror.

Haab — The yearly 365-day calendar.

Hablatun — The largest named period of the calendar. A period of 1.26 billion years.

Hun Yecil — The flood that destroyed the last world.

Hunab Ku — “One god,” or “the giver of movement and measure.”

Ik — Yucatec Mayan name of the second Tzolkin day sign, the Wind.

Imix — Yucatec Mayan name of the first Tzolkin day sign, the Alligator.

Inlakech — Mayan greeting meaning, “I am another yourself.”

Itzá — The postclassic-period invaders of the Yucatán peninsula.

Ix — Yucatec Mayan name of the fourteenth Tzolkin day sign, the Jaguar.

Izapa — Pre-Mayan site in the south of Mexico considered the possible birthplace of the Long Count.

Kan — Yucatec Mayan name of the fourth Tzolkin day sign, the Seed.

Katun — A calendar period of just under 400 years.

Kin — A day; also used as a mantra.

Kulkulkan — Mayan name for the feathered serpent.

Lamat — Yucatec Mayan name of the eighth Tzolkin day sign, the Rabbit.

Likin — The red eastern bacab.

Manik — Yucatec Mayan name of the seventh Tzolkin day sign, the Deer.

Mayapan — Important postclassic city in the Yucatán.

Men — Yucatec Mayan name of the fifteenth Tzolkin day sign, the Eagle.

Muluc — Yucatec Mayan name of the ninth Tzolkin day sign, the Moon.

Nohol — The southern yellow bacab.

Oc — Yucatec Mayan name of the tenth Tzolkin day sign, the Dog.

Olmec — Mayan civilization in Mexico famed for their giant sculpted heads.

One Hunahpu — The first father; representative of the birth of a world age.

Pacal — Ruler of Palenque whose sarcophagus was found buried in the Temple of Inscriptions.

Popol Vuh — Quiché Mayan creation story featuring the hero twins.

Quetzalcoatl — The Aztec name for the feathered serpent.

Quiché — Strongly traditional Mayan tribe living in Guatemala.

Tun — A calendar period of just 360 days.

Tzab — The Pleaides star cluster or Rattlesnake's tail.

Tzolkin — The Yucatec Mayan word for the 260-day count.

Uayeb — The five days of purification at the end of the yearly Haab calendar; considered unlucky.

Uinal — A twenty-day period of the Haab or Tun calendar.

Wajshikib Batz' — Traditional Quiché day keepers hold one of their most important ceremonies on the day Eight Batz to mark the beginning of a new 260-day cycle.

Xaman — The white northern bacab; also a Yucatec word for Shaman.

Xibalba — The underworld whose mouth is in the dark rift near the center of the galaxy.

Xochipilli — The Aztec prince of flowers, a god of intoxicating and hallucinatory plants.