Webster's New World Medical Dictionary

iatr-
Prefix indicating something related to a
physician or medicine, as in iatromisia (an intense
dislike of doctors).
iatrapistic
Having a lack of faith in doctors.
iatrogenic
Due to the activity of a physician or
therapy. For example, an iatrogenic illness is an ill-
ness that is caused by a medication or physician.
iatromelia
An ineffective or negligent medical
treatment.
iatromisia
An intense dislike of doctors or the
medical profession.
IBD
Inflammatory bowel disease. See 
bowel dis-
ease, inflammatory.
IBS
Irritable bowel syndrome.
ibuprofen
A nonsteroidal anti-inflammatory
drug (NSAID) that is commonly used to treat pain,
swelling, and fever. Common brand names of
ibuprofen include Advil, Motrin, and Nuprin.
I-cell disease
A rare, severe genetic disorder of
the lysosomes (organelles within a cell that contain
enzymes that can lyse, or digest, substances).
Multiple enzyme deficiencies associated with I-cell
disease lead to the accumulation of certain fatty sub-
stances (mucolipids) and certain complex carbohy-
drates (mucopolysaccharides) within the cells of
many tissues of the body. The name comes from the
deposits of accumulated material, known as inclu-
sion bodies. I-cell disease affects the kidneys, heart,
and nervous system. I-cell disease is inherited in an
autosomal recessive manner. There is no known
treatment for I-cell disease. Also known as muco-
lipidosis II.
ichthyosis, spasticity, oligophrenia syndrome
See 
Sjogren’s syndrome.
ichthyosis simplex
See 
ichthyosis vulgaris.
ichthyosis vulgaris
A genetic skin disease char-
acterized by scaly areas of skin that usually appear
in childhood. The palms and soles are often
affected. Areas that tend to be spared include the
armpits, the insides of the elbows, and the skin
behind the knee. Many people with ichthyosis vul-
garis also have asthma, eczema, or hay fever. The
gene responsible for this disease is located on chro-
mosome 1. Also known as ichthyosis simplex.