Medical Term Pre-fixes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| A-, An-, (before vowel) | without, lack of | apnea (without breath)
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| Ab- | away from | abnormal, abductor
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| Ad-, Af- | to, toward | adductor, afferent, adhesion
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| Ana- | up, back again | anabolic
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| Anti- | against | antisepsis
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| Apo- | away from | apochromatic (abnormal color)
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| Auto- | to do with self | autolysis, autopsy
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| Bi- | relating to two | bifurcation (separation into 2 branches)
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| Brachy- | short | brachycephalia (short head)
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| Brady- | slow | bradycardia, bradypnea (slow breathing)
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| Circum- | around | circumflex (winding about), circumcision (ouch)
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| Con- | with | congenital (born with)
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| Contra- | against, opposite | contraception, contralateral
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| Crypto- | hidden, concealed | cryptorchid (undescended testicle)
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| Cryo- | cold | cryotherapy
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| De- | away from | dehydrate
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| Dextro- | right | dextrocardia (pertaining to right side of heart
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| Di- | twice, double | diplopia (double vision)
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| Dia- | through, apart, across | diaphragm, diapedesis
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| Dys- | Bad, difficult | dyspnea (difficult breathing); Dysphagia (difficulty in eating)
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| E-, Ex-, Ef- | out, away from | eviscerate (remove viscera), efferent
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| Ec-, Ecto- | out, outside | eccentric, ectopic (out of place)
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| Em-, En- | in | encephalopathy (any brain disease)
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| Endo- | within | endometrium (inner lining of uterus), endoscope
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| Epi- | upon | epigastric
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| Eu- | well, good, normal | euphoria, euthyroid, eupea
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| Gravis- | heavy | gravida (pregnant woman)
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| Haplo- | single, simple | haplodermatitis (simple inflammation of the skin)
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| Hemi- | half | hemiplegia (paralysis on one side)
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| Hetero- | other, different | heterogenous
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| Homo- | same | homogenous
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| Hydro- | wet, water | hydronephrosis (urine collecting in renal pelvis)
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| Hyper- | over, above, excessive | hyperplasia (excessive formation)
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| Hypo- | under, below, deficient | Hypotension (low blood pressure)
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| Idio- | distinctive, peculiar to | idiopathic (disease of unknown cause), idiosyncrasy
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| Im-, In- | in, into | infiltration
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| Im-, In- | not | immature
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| Infra- | below | infraorbital (below eye socket)
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| Inter- | between | intercostal (between ribs)
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| Intra- | within | intraocular (within the eye)
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| Iso- | same, equal | isometric, isotonic
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| Leuko- | white | leukocyte
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| Levo- | left | levocardia (left side of heart)
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| Mal-, Malus- | bad | malignant, malformation
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| Mega- | large, great | megacolon (large colon), megaloblastic
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| Meso- | middle | mesoderm
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| Micro- | small | microglossia (small tongue)
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| Mono- | one, single | monochromatic
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| Multi- | many, much | multiparous (having given many births)
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| Necro- | having to do with death | necrosis, necropsy
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| Neo- | new | neoplasm (literally - new formation)
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| Oligo- | few, little | oligouria (formation of little urine)
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| Opistho- | behind, backward | opisthotic (behind the ears)
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| Ortho- | straight, normal, | orthopnea (able to breath only in correct, upright position)
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| Para- | beside, by side | paraplegia (paralysis of both sides), parathyroids
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| Per- | through | percutaneous
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| Peri- | around | periosteum (membrane around the bone)
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| Poikilo- | varied | poikiloderma (mottled skin), poikilothermic
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| Poly- | many, much | polymyalgia (pain in many
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| Post- | after, behind | postnatal (after birth)
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| Pre- | before, in front of | prenatal
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| Pro- | before, in front of | prognosis (foreknowledge)
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| Pseudo- | FALSE | pseudostratified
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| Re- | back, again | regurgitation
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| Retro- | backward, located | retroperitoneal (behind the peritoneum)
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| Sclero- | hard | sclerosis (hardening), arteriosclerosis
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| Semi- | half | semilunar (half moon, i.e., valves in aorta)
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| Sub- | under | sublingual
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| Super- | above, upper | supernatant
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| Supra- | above, upper | suprarenal
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| Steno- | narrow | stenosis (narrowing or constriction)
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| Sym-, Syn- | together, with | synapse, symphysis
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| Tachy- | fast, swift | tachycardia
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| Trans- | across, through | transection (cut across)
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| Tri- | three | tricuspid (heart valve)
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| Xero- | dry | xerodermia (dry skin)
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| Prefix | Meaning | Usage and/or Examples
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