(5th millennium BC - 4th millennium BC - 3rd millennium BC)
Significant persons:
Inventions, Discoveries, Introductions:
... dwarfism[?] Achromatopsia incomplete, X-linked[?] Achromatopsia Acid maltase deficiency[?] Acidemia, isovaleric[?] Acidemia, propionic[?] Acitreti ...