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Understanding Medical Terminology Prefixes

May 2, 2025

Medical Terminology Prefixes - Lecture by John Campbell

Introduction

  • Speaker: John Campbell
  • Topic: Prefixes in medical terminology
  • Function of Prefixes: Comes in front of a word, providing additional information

Prefix "A" or "AN"

  • Meaning: Without
  • Examples:
    • Apnea: Without breath
    • Achlorhydria: Without hydrochloric acid in the stomach
    • Atony: Without muscle tone
    • Anemia: Without blood (reduced hemoglobin)
    • Anesthetic: Without feeling

Prefix "ANTI"

  • Meaning: Against or opposed to
  • Examples:
    • Antibiotic: Against bacteria
    • Anti-inflammatory: Against inflammation

Prefix "ANTE"

  • Meaning: Before
  • Examples:
    • Antenatal: Before birth

Prefix "BRADY"

  • Meaning: Slow
  • Examples:
    • Bradycardia: Slow heart rate
    • Bradykinesia: Slow movement

Prefix "CARDIO"

  • Meaning: Heart
  • Examples:
    • Cardiomegaly: Enlarged heart
    • Cardiology: Study of the heart

Prefix "CHOL(E)"

  • Meaning: Bile
  • Examples:
    • Cholecystectomy: Removal of gallbladder
    • Cholangitis: Inflammation of bile ducts

Prefix "COL(O)"

  • Meaning: Colon
  • Examples:
    • Colostomy: Surgical opening into the colon
    • Colitis: Inflammation of the colon

Prefix "CYT(O)"

  • Meaning: Cell
  • Examples:
    • Cystitis: Inflammation of the bladder

Prefix "ENDO"

  • Meaning: Inside
  • Examples:
    • Endoscopy: Looking inside
    • Endocardium: Inside layer of the heart

Prefix "ENTER(O)"

  • Meaning: Intestine
  • Examples:
    • Enteric: Relating to the intestine

Prefix "DYS"

  • Meaning: Abnormal, painful
  • Examples:
    • Dysuria: Painful urination
    • Dysphagia: Difficulty swallowing

Prefix "GASTR(O)"

  • Meaning: Stomach
  • Examples:
    • Gastritis: Inflammation of the stomach

Prefix "GLY(CO)"

  • Meaning: Sugar
  • Examples:
    • Hypoglycemia: Low blood sugar

Prefix "HEM(A)" or "HEMAT(O)"

  • Meaning: Blood
  • Examples:
    • Hematuria: Blood in urine
    • Hematology: Study of blood

Prefix "HEPAT(O)"

  • Meaning: Liver
  • Examples:
    • Hepatomegaly: Enlarged liver

Prefix "HYPER" / "HYPO"

  • Meaning: High / Low

Prefix "LAPAR(O)"

  • Meaning: Abdomen
  • Examples:
    • Laparoscopy: Looking into the abdomen

Prefix "LITH(O)"

  • Meaning: Stone
  • Examples:
    • Lithotripsy: Breaking stones

Prefix "LIP(O)"

  • Meaning: Fat
  • Examples:
    • Lipoma: Fatty lump

Prefix "MAL"

  • Meaning: Abnormal
  • Examples:
    • Malfunction: Abnormal function

Prefix "MAST(O)"

  • Meaning: Breast
  • Examples:
    • Mastectomy: Removal of breast

Prefix "MY(O)"

  • Meaning: Muscle
  • Examples:
    • Myocarditis: Inflammation of heart muscle

Prefix "NEPHR(O)"

  • Meaning: Kidney
  • Examples:
    • Nephritis: Inflammation of kidneys

Prefix "OLIG(O)"

  • Meaning: Few, not enough
  • Examples:
    • Oliguria: Low urine output

Prefix "PERI"

  • Meaning: Around
  • Examples:
    • Pericarditis: Inflammation around the heart

Prefix "PROSTAT(O)"

  • Meaning: Prostate
  • Examples:
    • Prostatitis: Inflammation of the prostate

Prefix "PYRO"

  • Meaning: Heat, fire
  • Examples:
    • Pyrexia: Fever

Prefix "TACHI"

  • Meaning: Fast
  • Examples:
    • Tachycardia: Fast heart rate

Conclusion

  • Prefixes are crucial in understanding medical terms as they provide context and modify meanings based on the root words.