conception : Idioms & Phrases

• (Med.), an abnormal conception in which a mole, or misshapen fleshy mass, is produced instead of a properly organized fetus.

Webster 1913

• noun Roman Catholic holy day first celebrated in 1854
  December 8.
  
• noun (Christianity) the Roman Catholic dogma that God preserved the Virgin Mary from any stain of original sin from the moment she was conceived
  Immaculate Conception.
  

WordNet

• (R. C. Ch.), the doctrine that the Virgin Mary was conceived without original sin.

Webster 1913

• noun (Christianity) the Roman Catholic dogma that God preserved the Virgin Mary from any stain of original sin from the moment she was conceived
  Immaculate Conception.
  

WordNet