A or An
absence of, without, not
ex: atrophy
Ab
away from
ex: abduction
Ad
to, toward, near
ex: adduction
Ambi
both
ex: ambidextrous
Ante
before
ex:anteversion
Anti
against
ex. antibiotic
Arthro
joint
ex: arthrodesis
Auto
self
ex. autograft
Bi
two
ex: bipolar
Bio
life
ex: biology
Circum
around
ex: circumduction
Contra
against, opposed
ex: contradiction
Cost
rib
ex: costal
Counter
against
ex: counteract
Cut
skin
ex: cutaneous
Cyst
sac
ex: osteocystoma
Derma
skin
ex: dermatome
Di
two
ex: diarthric
Dis
opposite of apart
ex: dislocate
Dors
back
ex: dorsal
En
in
ex: endocrine
End
within
ex: endosteum
Epi
on, upon
ex: epicondyle
Erythro
red
ex: erythrocyte
Ex or E
from, without
ex: exostosis
Exo
outside
ex: exoskeleton
Extra
outside, in addition
ex: extra articular
Hem or Hema
blood
ex: hematoma
Hemi
half
ex: hemiarthroplasty
Hetero
other
ex: heterogeneous
Homo
same
ex: homogeneous
Hyper
above, excessive
ex: hyperextension
Hypo
below, deficiency
ex: hypocondytar
In
within, into, not
ex: intravenous
Leuko
white
ex: leukocytes
Lip
fat
ex. lipid
Mal
disordered, bad
ex: malignancy
Micro
small
ex: microlith
Myelo
narrow, spinal cord
ex: myeloma
Myo
muscle
ex: myoblast
Neuro
nerve
ex: neuroblast
Os or Osteo
bone marrow, spinal cord
ex: osteomyelitis
Para
beside, the opposite, abnormal
ex: paravertebral
Path
disease
ex: pathologist
Ped
foot, relationship to child
ex: pediatrician
Peri
around, about
ex: periosteum
Pneumo
air, lung
ex: pneumonia
Poly
many
ex: polycentric
Post
after
ex: postoperative
Pro
before, for
ex: prototype
Pseudo
false
ex: pseudoarthrosis
Quad
four
ex. quadriceps
Retro
backward, behind
ex: retrograde
Semi
half
ex: semiprone
Septic
poison
ex: septicemia
Sub
under
ex: subcapsular
Super
above, greater, over
ex: superior
Supra
above, upon
ex: supracondylar
Sym, Syn
with, together
ex: symphysis
Thoraco
chest
ex: thoracotomy
Trans
across, beyond
ex: transverse
Tri
three
ex: triceps
Uni
one
ex: unilateral