Google does not have its own medical dictionary, although it offered a general dictionary feature called Google Dictionary until 2011. Google users who need to define medical terms can use the "define" search operator followed by the medical term to be defined to see a definition at the top of the search results. They can also access free online medical dictionaries on Dictionary.com and the National Institute's of Health's MedlinePlus.
Dictionary.com includes definitions from the American Heritage Medical Dictionary and includes options to browse medical terms by letter or enter the words in a search box. MedlinePlus is powered by Merriam-Webster's medical dictionary, and users enter search terms on the site. MedlinePlus also offers supplements to help users break down the terms in medical words for easier understanding.