A/An
Without (atrophy)
Ab
Away, from (abnormal)
Ad
Near, towards (adrenal)
Adeno
Gland (adenocarcinoma)
Aero
Air (aerobic)
Af
Toward (afferent)
Alb
White (albino)
Algia
Pain (neuroalgia)
Allo
Other, different (allele)
Ameb
Change (ameba)
Amo
Love (amorphis)
Amphi
Both (amphibian)
An
Without (annialate)