American Heritage Dictionary
(3)
Century Dictionary
(2)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
Just an an FYI, in medicinal (clinical) trials, patients are given the Standard of Care per federal regulations, or what they would have received in care if they had not opted to participate in the trial.— Advertising Age - Homepage
Solomon's Seal is edible and medicinal, the young edible shoots are an excellent vegetable when boiled and eaten like Asparagus.— Find Me A Cure
There are 400 species of St. John's Wort found throughout the world, it has been used as a medicinal for thousands of years, but has only recently been studied for its medicinal value.— Find Me A Cure
The Greenbrier, needs to bring it back to its roots, namely the medicinal need for warm, sulfur-infused water.— SeekingAlpha.com: Home Page

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word a few times a month.