In the ancient calendar of the Maya Indians, a period of twenty years.(noun)
The Century Dictionary (Public Domain)
Use "katun" in a sentence
"_hunpel katun_, one katun (twenty years), or, _hopel in katunil_, I am five katuns, or a hundred years old, as the case might be."
"Since the Maya year was only 360 days (with five "unlucky" days), 1 katun = 20 years x 360 days = 7200 days, not 7254 days as Chatelain would have it."
"His other major claim to fame was his rewriting of the Maya Calendar based on the chance observation that the conjunctions (i. e when two or more planets closely approach one another) of Jupiter and Saturn occurred about 7254 days apart instead of the 7200 day katun, the basic 20 year time period of the Maya calendar."