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Medical TERMINOLOGY   -   A thru Z

Prefixes, roots, suffixes  [ O ]

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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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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Medical Calculators - A thru Z
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