As a noun monkshood is
(countable) any of various poisonous plants, of the genus aconitum
, with blue or white flowers in the shape of a hood.
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* monk's hood
(countable) Any of various poisonous plants, of the genus Aconitum , with blue or white flowers in the shape of a hood
(uncountable) The dried leaves or flowers of these plants formerly used as a source of medicinal alkaloids
* aconite, wolfsbane