Septuagesima

sep-tū-a-jes′i-ma, n. the third Sunday before Lent—the seventieth day before Easter (the common but dubious explanation).— adj. Septuages′imal , consisting of seventy: counted by seventies. [L. septuagesimus — septem , seven. The name, like Quinquagesima and Sex age sima , was most probably adopted on a false analogy with Quad rage sima , the Latin name of Lent.]