monkshood
noun
monks·hood ˈməŋ(k)s-ˌhu̇d 
: any of a genus (Aconitum) of usually bluish flowered poisonous herbs of the buttercup family
especially : a poisonous Eurasian herb (A. napellus) often cultivated for its showy terminal racemes of white or purplish flowers compare wolfsbane
Example Sentences
Recent Examples on the Web In the next few weeks, visitors can expect to see monkshood, delphiniums, mock orange and comfrey blooming. 
Anchorage Daily News, 11 July 2018
Anchorage Daily News, 11 July 2018 Word History
First Known Use
1577, in the meaning defined above
Medical Definition
monkshood
noun
monks·hood ˈməŋ(k)s-ˌhu̇d
: any plant of the genus Aconitum
especially : a Eurasian herb (A. napellus) often cultivated for its showy white or purplish flowers that is extremely poisonous in all its parts see aconite sense 2