leuko
white; as leukocyte
lith
stone, calculus; as cholelith
macro
large; as macrocyte
mal
ill or bad; as malnutrition
mega
enlarged; as hepatomegaly
micro
small; as microorganism
myo
muscle; as myoglobin
nephro
kidney; as nephrosis
neuro
nerve; as neuralgia
oligo
few, scant; as oliguria
opia
sight; vision as myopia
ophtalmo
eye; as ophthalmology