carene

noun

1. (historical, obsolete, rare, uncountable)Synonym of carenum (“reduction of must or sweet wine in ancient European cuisine”).
2. (historical, rare)A 40-day fast or period of similar abstinence.
3. (historical, rare)An indulgence from 40 days of fasting or similar abstinence, especially during Lent; (later) various equivalent indulgences against punishment in Purgatory.

   “Careen (and its Latin source, quadragene) no longer made sense in the fifteenth century because priests no longer distributed punishments in forty-day parcels, the duration of Lent... the culture had shifted from brief punishments on earth to long punishments in the afterlife, in Purgatory. But the term was still in circulation, and people sought to make sense of it by inventing new definitions for it.”

4. (obsolete)The lower portion of a marine animal's shell, covering its mantle.