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Medical Terminology
Common medical suffixes, prefixes, word roots, and pluralizing ending changes
| Term | Definition |
|---|---|
| Dermat/o | Skin |
| Cutane/o | Skin |
| Nephr/o | Kidney |
| Ren/o | Kidney |
| Somat/o | Mouth |
| Or/o | Mouth |
| Esthes/o | Feeling |
| Therm/o | Heat |
| Muscul/o | Muscles |
| Nas/o | Nose |
| Ur/o | Urine |
| Nat/o | Birth |
| Chondr/o | Cartilage |
| Arthr/o | Joints |
| Erythr/o | Red coloring |
| Gastr/o | Stomach |
| Hepat/o | Liver |
| Immun/o | Immune |
| Oste/o | Bones |
| Enter/o | Intestines |
| -itis | Inflammation |
| -megaly | Enlargement |
| -oma | Cancer |
| Splen/o | Spleen |
| Hyster/o | Uterus |
| Neur/o | Nerves, nervous system |
| Ot/o | Ears |
| Hydr/o | Water |
| -ectomy | Surgical removal |
| -centesis | Puncture |
| -lysis | Destruction |
| -pexy | Fixation (of an organ) |
| -plasty | Repair |
| -rrhaphy | Suture |
| -stomy | Forming a mouth, opening |
| -tomy | Incision |
| -tripsy | Crushing (usually of a stone) |
| -algia | Pain |
| -cele | Hernia, swelling |
| -desis | Binding |
| -ectasis | Dialation |
| -edema | Watery fluid |
| -emisis | Vomiting |
| -gen, genesis | Forming, producing |
| -iasis | Abnormal |
| -lith | Stone |
| -malacia | Softening |
| -pathy | Disease |
| -penia | Decrease, deficiency |
| -phagia | Swallowing |
| -phasia | Speech |
| -plasia | Forming, growth |
| -plegia | Paralysis |
| -sclerosis | Abnormal condition of hardening |
| -stenosis | Narrowing |
| -toxic | Poison |
| -trophy | Development, nourishment |
| -logy | The study of |
| -ac | Pertaining to |
| -al | Pertaining to |
| -ary | Pertaining to |
| -ic, ical | Pertaining to |
| -tic | Pertaining to |
| -esis | Condition |
| -is | Noun ending |
| -ism | Condition |
| -iatry | Physician, treatment |
| -ist | Specialist |
| -ole | Small, minute |
| -ule | Small, minute |
| -icle | Small, minute |
| -gram | Record, writing |
| -graph | Instrument for recording |
| -graphy | Process of recording |
| -meter | Measure |
| -metry | Act of measuring |
| -scope | Instrument for examining |
| -scopy | Visual examination |
| -y changes to | -ies |
| -us changes to | -i |
| -um changes to | -a |
| -a changes to | -ae |
| -ix changes to | -ices |
| -en changes to | -ina |
| -ax changes to | -aces |
| -is changes to | -es |
| -ex changes to | -ices |
| -ma changes to | -mata |
| -on changes to | -a |
| Hemat/o | Blood |
| Encephal/o | Brain |
| -dynia | Pain |
| -clasis | To break; Surgical fracture |
| -tome | Instrument to cut |
| -phobia | Fear |
| -rrhea | Flow, discharge |
| -spasm | Involuntary contraction, twitching |
| Pre- | Before |
| Peri- | Around |
| Post- | After |
| Endo- | In, within |
| Intra- | In, within |
| Epi- | Above, upon |
| Hypo- | Under, below; Deficient |
| Infra- | Under, below |
| Sub- | Under, below |
| Inter- | Between |
| Retro- | Backward, behind |
| Bi- | Two |
| Dipl- | Double |
| Diplo- | Double |
| Hemi- | One-half |
| Hyper- | Excessive, above normal |
| Macro- | Large |
| Micro- | Small |
| Mono- | One |
| Uni- | One |
| Multi- | Many, much |
| Poly- | Many, much |
| Quadri- | Four |
| Tri- | Three |
| Ab- | From, away from |
| Ad- | Toward |
| Circum- | Around |
| Peri- | Around |
| Dia- | Through, across |
| Trans- | Through, across |
| Ecto- | Outside, outward |
| Exo- | Outside, outward |
| Extra- | Outside, outward |
| Para- | Near, beside; Beyond; To bear (offspring) |
| Super- | Upper, above |
| Supra- | Above; Excessive; Superior |
| Ultra- | Excess, beyond |
| A-, An- | Without, not |
| Anti- | Against |
| Contra- | Against |
| Auto- | Self, own |
| Brady- | Slow |
| Dys- | Bad; Painful; Difficult |
| Eu- | Good, normal |
| Hetero- | Different |
| Homo- | Same |
| Homeo- | Same |
| Postnatal | Pertaining to (the period) after birth |
| Prenatal | Pertaining to (the period) before birth |
| Polyphobia | Fear of many things |
| Antibacterial | Against bacteria |
| Bradycardia | Slow heart rate |
| Extracranial | Pertaining to outside the skull |
| Quadriplegia | Paralysis of all four extremities |
| Postoperative | After surgery |
| Epigastric | Pertaining to (the area) above the stomach |
| Diplopia | Double vision |
| Hemiplegia | Paralysis of one half |
| Macrocyte | Large cell |
| Primigravida | First pregnancy |
| Nulligravida | Never been pregnant |
| Abduction | Movement of a limb away from (the body) |
| Adduction | Movement of a limb toward (the body) |
| Adsternal | Near or toward the sternum |
| Dyspepsia | Painful indigestion |
| Retroperitoneal | Behind the peritoneum |
| Hypodermic | Pertaining to under the skin |
| Homograft | Same transplantation |
| Intercostal | Between the ribs |