Prefix : A prefix is an element placed at the beginning of a word to adjust or qualify its meaning.

Learn with examples for Prefix: Infra, Intra, Inter, Iso, Mal, Macro, Mega, Micro, Neo, Noct, Para, Per, Peri, Poly, Pre, Post, Retro, semi, super, supra, tachy, trans

Infra-              below, under

Intra-              within

Inter-              between

Iso-                 equal, same

Mal-                bad, poor

Macro-           large

Mega-             large

Micro-            small

Neo-               new

Noct-              Night

Para-              by the side of

Per-                through

Peri-               surrounding, around

Poly-              many

Pre-                before

Post-              after

Retro-            backward, behind

Semi-             half

Super-           above, excessive

Supra-           Above

Tachy-           fast

Trans-            across

Analgesia: It refers to the absence of pain.

R20.0 Anesthesia of skin


Anodontia: It is a dental condition characterized by complete absence of teeth.

K00.0 Anodontia


Anosmia: It is the partial or complete loss of the sense of smell.

R43.0 Anosmia


Aphagia: It refers to loss of the ability of swallow.

R13.0 Aphagia


Aphonia: It refers to loss of voice.

R49.1 Aphonia

Ambidextrous: It is the ability to use both the right and left hand equally well.

Antepartum: It refers to the time period before childbirth.

O46.001 Antepartum hemorrhage with coagulation defect, unspecified, first trimester


Anteversion: It means “leaning forward”. Femoral anteversion is a condition in which the femoral neck leans forward with respect to the rest of the femur.

Q65.89 Other specified congenital deformities of hip (Anteversion of femoral neck)


Anterolisthesis: It refers to the forward positioning of one spinal vertebra in relation to the adjacent vertebra beneath it.


Anteprandial: Before a meal, especially before dinner.

Antibody: An antibody is a class of protein called an immunoglobulin, which is made by specialised white blood cells to identify and neutralise foreign objects like bacteria and viruses.


Anticoagulant: It is commonly known as blood thinners, are chemical substances that prevent or reduce coagulation of blood, prolonging the clotting time.


Antidiuretic: It is a substance that helps to control fluid balance by reducing urination and opposing diuresis.


Antiseptic: It is a substance that stops or slows down the growth of microorganisms.


Antidote: It is a substance that counteract the effects of poison.

Autograft: Tissue transplanted from one part of the body to another in the same individual.

T86.821 Skin graft (allograft) (autograft) failure


Autoimmune disease: An illness that occurs when the body tissues are attacked by its own immune system.


Autointoxication: It refers to poisoning with toxic substances formed within the body, as during intestinal digestion.

Bradycardia: It is an abnormally slow heart rate of less than 60 beats per minute

R00.1 Bradycardia, unspecified


Bradykinesia: It refers to slowness of movement.

R25.8 other abnormal involuntary movements


Bradypnea: It is the medical term for abnormally slow breathing.

R06.89 other abnormalities of breathing

Dysmenorrhea: It is the medical term for pain with menstruation.

N94.6 Dysmenorrhea, unspecified


Dyspareunia: It is the medical term for painful intercourse.

N94.10 Unspecified dyspareunia


Dysphagia: It is the medical term for swallowing difficulties.

R13.10 Dysphagia, unspecified


Dyspnea: It is the medical term for shortness of breath.

R06.00 Dyspnea, unspecified


Dystocia: It describes difficulty during labour.

O66.9 Obstructed labor, unspecified

Ectocardia: It refers to a congenital displacement of the heart.


Ectropion: It is a condition in which the eyelid turns outward.

H02.101 Unspecified ectropion of right upper eyelid


Exophthalmos: It is also known as proptosis, is the medical term for bulging or protruding eyeballs.

H05.20 Unspecified exophthalmos

Endometritis: Inflammation of the inner lining of the uterus. (Endometrium)

N71.9 Inflammatory disease of uterus, unspecified


Endophlebitis: Inflammation of the inner coat (tunica intima) of a vein.

I80.10 Phlebitis and thrombophlebitis of unspecified femoral vein


Endophthalmitis: Inflammation of the interior of the eye.

H44.001 Unspecified purulent endophthalmitis, right eye


Endocarditis: It is an infection of the endocardium, which is the inner lining of the heart chambers and heart valves.

I38 Endocarditis, valve unspecified


Endocervicitis: Inflammation of the mucous membrane of the uterine cervix.

N72 Inflammatory disease of cervix uteri

Eucapnia: The presence of normal amounts of carbon dioxide in the blood.


Eunatremia: A normal concentration of sodium in blood plasma.


Eupnea: It refers to normal relaxed breathing.

Extrasystoles: Heart beats that occur outside the heart’s regular rhythm are known as extrasystoles.


Extrauterine pregnancy: A pregnancy that is not in the usual place and is located outside the inner lining of the uterus.

Homogenesis: A method of reproduction in which the parents and offspring are alike.


Homograft: A graft of tissue taken from a donor of the same species as the recipient (allograft).


Homosex: It refers to sexual attraction or sexual behaviour between members of the same sex or gender.


Homozygous: It is a genetic condition where an individual inherits the same alleles for a particular gene from both parents.

Heterochromia: It is used to describe the condition where a person has different coloured eyes.


Heterograft: A tissue graft taken from a species different from that of the recipient. It is also known as xenograft.


Heterozygous: It refers to having inherited different forms of a particular gene from each parent.

Hemianalgesia: It refers to loss of pain sensation on one side of the body.

R20.0 Anesthesia of skin


Hemianopia: It describes visual defects that occupy about half of an eye’s visual space.

H53.46 Homonymous bilateral field defects


Hemicardia: It refers to lateral half of the heart, either the right or left.

Q24.8 Other specified congenital malformations of heart


Hemiparesis: It refers to weakness or inability to move on one side of the body.

G81.90 Hemiplegia, unspecified affecting unspecified side


Hemispasm: A spasm that affects only one lateral side of the body.

R25.2 Cramp and spasm

Hyperglycemia: It refers to high levels of sugar or glucose in the blood.

R73.9 Hyperglycemia, unspecified


Hypertension: It is also known as high blood pressure, is a medical condition in which the blood pressure in the arteries is persistently elevated.

I10 Essential (primary) hypertension


Hypercapnia: It is a condition of abnormally elevated carbon dioxide levels in the blood.

R06.89 Other abnormalities of breathing


Hypergonadism: It is a condition where the gonads or the reproductive glands tend to produce hormones in excess.

E28.8 Other ovarian dysfunction


Hyperkalemia: It refers to abnormal high potassium levels in the blood.

E87.5 Hyperkalemia

Hypoglycemia: It refers to low levels of sugar or glucose in the blood.

Hypotension: It is also known as low blood pressure, occurs when blood pressure drops below the normal range.

Hypocapnia: It is also known as hypocarbia, is a state of reduced carbon dioxide in the blood.

Hypogonadism: It is a condition where the gonads or the reproductive glands tend to produce little or no sex hormones.

Hypokalemia: It refers to low levels of potassium in the blood

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