sanguinary

Short definition from Wiktionary

Adjective

1. 1
   Involving bloodshed.
2. 2
   Eager to shed blood; bloodthirsty.
3. 3
   Consisting of, covered with, or similar in appearance to blood.

Noun

1. 1
   A bloodthirsty person.
2. 2
   The plant common yarrow, or herba sanguinaria (Achillea millefolium).