A; An
not; without
amoral
not moral or without moral responsibility
amorphous
without definite form; shapeless
anarchy
absence of rule or government
anemia
lack of a normal number of red blood cells
anhydrous
without water
anomaly
deviation from the common rule
anomalous
not normal, abnormal
anonymous
nameless or unnamed origin
anoxia
deprived of oxygen
aseptic
free from disease causing microorganisms
atheism
godlessness; denial of existence of a supreme being.
atypical
unlike the typical; not usual