Search Result for "date of reference":
Wordnet 3.0

NOUN (1)

1. (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded;
[syn: epoch, date of reference]


WordNet (r) 3.0 (2006):

date of reference n 1: (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded [syn: epoch, date of reference]