Noun | 1. | crescent-cell anaemia - a congenital form of anemia occurring mostly in blacks; characterized by abnormal blood cells having a crescent shape crescent-cell anemia, drepanocytic anaemia, drepanocytic anemia, sickle-cell anaemia, sickle-cell anemia, sickle-cell disease monogenic disease, monogenic disorder - an inherited disease controlled by a single pair of genes |