septuagesima Meaning, Definition & Usage

  1. noun the 3rd Sunday before Lent (or the 9th before Easter)
    Septuagesima Sunday.

WordNet

Sep`tu*a*ges"i*ma noun
Etymology
NL., fr. L. septuagesimus the seventieth, fr. septuaginta seventy.
Definitions
  1. (Eccl.) The third Sunday before Lent; -- so called because it is about seventy days before Easter.

Webster 1913