any one of the letters from A to G used in church calendars to mark the Sundays throughout any particular year, serving primarily to aid in determining the date of Easter.
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How to use dominical letter in a sentence
He also mentions the lunar cycle, and uses the dominical letter with the kalends of several years.An Illustrated History of Ireland from AD 400 to 1800 | Mary Frances Cusack
The dominical letter of that year, which was the tenth of the cycle, was consequently B.
In this manner it is easy to find the dominical letter belonging to each of the twenty-eight years of the cycle.
Let L denote the number of the dominical letter of any given year of the era.
Before the intercalation the dominical letter had retrograded one place less.
British Dictionary definitions for dominical letter
Christianity any one of the letters A to G as used to denote Sundays in a given year in order to determine the church calendar
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012