Dictionary

Enter a word or phrase below to search our online dictionary of over 1,300 general medical terms, or click on a letter of the alphabet to view all terms beginning with that letter:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Search for 'I'

Phrase Definition
iatrogenic Resulting from medical treatment.
ichthyosis An inherited skin disorder that produces dry, rough, scaly skin.
identical twins Twins formed from a single egg. They are of the same gender and have the same genetic makeup. Also called monozygotic twins.
idiopathic Without a known cause.
ileitis Inflammation of the lower part of the small intestine.
ileum The lower part of the small intestine.
ileus Lack of movement of digested food and juices through the gastrointestinal tract. May be due to a blockage of the intestine.
ilium The flared portion of the pelvis. The hip bone.
IM Intramuscular.
immune Resistant to a particular disease.
immunity Resistance of the body to infection.
immunization The process of making an individual immune by vaccination or inoculation.
immunoglobulin A serum protein involved in immunity. An antibody.
impetigo Skin infection characterized by erupting sores. Caused by staphylococcus or streptococcus bacteria.
impotence Inability of a male to achieve erection and orgasm.
in situ In its original place. Carcinoma in situ means cancer that hasn't spread to other locations.
incision A cut.
incisor Any of the front four teeth on either the upper or lower jaw.
incompetent 1. Unable to make rational decisions. 2. Not functioning properly.
incontinence Inability to hold urine or feces.
incubate To provide the proper conditions for growth.
indigestion Upper abdominal discomfort usually experienced after a meal due to incomplete digestion.
induration The process of hardening. An abnormally hard spot.
infarct An area of dead or dying tissue produced by lack of blood flow to or from that area. For example, myocardial infarction is the death of heart muscle.
infection Causing disease, especially by the presence of foreign microorganisms in the body, including bacteria, viruses or parasites.
infectious disease A disease that can be spread from one person to another.
infertility Inability to produce children.
inflammation Swelling, redness, warmth and pain. A body tissue's protective response to injury.
influenza A contagious and infectious respiratory illness usually occurring in the winter.
ingrown nail Edges of the nail become trapped under the skin, causing inflammation and, sometimes, infection.
injection A fluid introduced into the body by a syringe and needle.
innate Inborn, hereditary.
inoculation The injection of a disease agent into the body to cause a mild form of the disease and build immunity.
inoperable Not curable through surgery.
insanity Any form or degree of mental disturbance or unsoundness of mind, permanent or temporary, that makes a person incapable of rational conduct or judgment.
insemination To deposit sperm in the vagina.
insomnia An inability to fall asleep or to remain asleep.
insulin The hormone produced by the pancreas for regulating carbohydrate metabolism. Used in the treatment of diabetes mellitus.
integument Skin.
intercourse The exchange of communication between individuals. Sexual intercourse is the sexual joining of two people; coitus.
intestine The tube involved in digestion and extending from the stomach to the anus. Consists of the small intestine and the large intestine.
intoxication Poisoning, or the state of being affected by a poisonous substance. Often used to describe drunkenness.
intracellular Within a cell.
intradermal Within the skin.
intramuscular Within the muscle.
intrauterine Within the womb.
intravenous Within a vein. Intravenous infusion means to direct fluids through a needle or catheter directly into a vein.
intussusception Telescoping a section of the intestine into an adjoining section.
iris The colored portion of the eye. It's a muscle that controls the amount of light entering the pupil.
iritis Inflammation of the iris.
irrigation Washing of a body cavity or wound with a stream of water.
ischemia A lack of blood supply to a body part.
IUD Intrauterine device. Used for contraception.
IV Intravenous.
IVP Intravenous pyelography.