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Medical TERMINOLOGY   -   A thru Z

Prefixes, roots, suffixes

Prefix: A prefix is placed at the beginning of a word to modify or change its meaning. Pre means "before." Prefixes may also indicate a location, number, or time.    Root: central part of a word.   Suffix:  The ending part of a word that modifies the meaning of the word. Example: homeless. Root = 'home' and the suffix is 'less'. It can also refer to a condition, disease, disorder, or procedure.
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O

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Term
Meaning
obstetr/o pregnancy; birth
ocul/o eye
odont/o tooth
odyn/o pain
-oid resembling; derived from
-ole little; small
ole/o oil
olecran/o olecranon (elbow)
olig/o scanty
om/o shoulder
-oma tumor; mass; fluid collection
omphal/o umbilicus (navel)
onc/o tumor
-one hormone
one mono, uni
one and a half bi, di
onych/o nail (of fingers or toes)
o/o egg
oophor/o ovary
-opaque obscure
ophry/o eyebrow
ophthalm/o eye
-opia vision condition
opisth/o backward, behind
-opsia vision condition
-opsy view of
opt/o eye; vision
optic/o eye; vision
-or one who
or/o mouth
orch/o testis
orchi/o testis
orchid/o testis
-orexia appetite
organ/o organ
orth/o straight
osche/o scrotum
-ose full of; pertaining to; sugar
-osis condition, usually abnormal
-osmia smell
osphresi/o sense of smell
ossicul/o ossicle (small bone)
oste/o bone
-ostosis condition of bone
ot/o ear
-otia ear condition
-ous pertaining to
ov/o egg
ovari/o ovary
ovul/o egg
ox/o oxygen
-oxia oxygen
oxy- swift; sharpp; acid
oxysm/o sudden
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