Most definitions found in this glossary are adapted with permission from this text book:

Maheu, M., Whitten, P., & Allen, A. (2001). eHealth, Telehealth & Telemedicine: A Guide to Startup and Success. New York: Jossey-Bass.

Browse the glossary using this index

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The scientific measurement and analysis of human biological data using technology. A common application of biometrics is identity authentication performed by verifying retinal or iris scans, fingerprint patterns, DNA sequence characteristics, or voice patterns.
Entry link: Biometrics


A binary digit, the basic unit of data used by computers for information storage, transmission, and entry. Represented as off or on by the digits 0 or 1 and grouped into strings of eight bits known as bytes, these units take the place of numbers, letters, and symbols in electronic media.
Entry link: Bit

Bit depth

The number of colors or pixels of gray supported by a monitor or scanner. Also known as bit resolution or pixel depth.
Entry link: Bit depth


Describing telecommunication over a single medium that provides multiple channels of data for high-speed transmission. Also applied to the higher bandwidth that will support real-time, full-motion audioconferencing and videoconferencing.
Entry link: Broadband


Program that runs on a client’s computer and communicates with Internet Web servers by connecting to Web sites and sending information to enable interaction.

Entry link: Browser


Centers for Medicare & Medicaid Services (CMS)

Is the federal agency that administers the Medicare, Medicaid and Children’s Health Insurance Program.

Entry link: Centers for Medicare & Medicaid Services (CMS)

Charge-coupled device (CDD)

A device that converts light into electronic information via sensors that collect light as a buildup of electrical charge. The signal that results from this conversion can be translated into computer code to form an image. This device is commonly used in television cameras, digital still-image cameras, and image scanners.
Entry link: Charge-coupled device (CDD)

Chat room

An Internet site or virtual community that provides real-time communication via the exchange of text messages (as well as sound and video files) between participants.
Entry link: Chat room

Children’s Waiver Services Program

Is a federal program that provides Medicaid-funded home and community-based services to children under age 18 who are eligible for, and at risk of, placement into an Intermediate Care Facility for the Mentally Retarded (ICF/MR).


Entry link: Children’s Waiver Services Program

Click stream data

Information used by Web advertisers showing the number of Web page visits or clicks of the mouse by a consumer visiting a Web site.
Entry link: Click stream data

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