Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Alzheimer's Disease Health Center

Font Size

Glossary of Alzheimer's Disease Terms


Functional capabilities: What a person is able to do.

Gait: A person's manner of walking. People in the later stages of Alzheimer's disease often have a "reduced gait," which means their ability to lift their feet as they walk has diminished.

Gene: The basic unit of heredity found in all cells. Each gene occupies a certain location on a chromosome.

Genetic counseling: A process in which a genetic counselor obtains a complete family and personal medical history in order to determine the probable existence of a genetic problem occurring and reoccurring within a family.

Genetic susceptibility: The state of being more likely than the average person to develop a disease as the result of genetics.

Genetic testing: Certain tests that are ordered by a doctor who specializes in genetics so that the presence of genetic abnormalities may be discovered. For patients and families suspected of having an inherited disease, it may be possible to find the mutation causing the disease through genetic testing of blood.

Genome: All the genes of an organism.

Geriatrician: A doctor who specializes in the medical care and treatment of older adults.

Glucose: A simple sugar that is a major energy source for all cellular and bodily functions. Glucose is obtained through the breakdown, or metabolism, of food in the digestive system.

Guardian: An individual appointed by the courts who is authorized to make legal and financial decisions for another person.

Hallucination: A sensory experience in which a person sees, hears, smells, tastes, or feels something that is not there.

Hippocampus: A part of the brain that is important for learning and memory.

Hoarding: Collecting and putting things away in order to guard them.

Hospice: The philosophy and approach to providing comfort and care at life's end rather than heroic life-saving measures.

Huntington's disease: An inherited brain disease affecting the body that is characterized by mood changes, intellectual decline, and involuntary movement of limbs.

Immune system: The body's natural defense system against infection or disease; a system of cells that protects the body from bacteria, viruses, toxins, and other foreign substances.

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13

Today on WebMD

Remember your finger
When it’s more than just forgetfulness.
senior man with serious expression
Which kinds are treatable?
senior man
Common symptoms to look for.
mri scan of human brain
Can drinking red wine reverse the disease?
eating blueberries
Colored mri of brain
Close up of elderly couple holding hands
mature woman
Woman comforting ailing mother
Senior woman with serious expression