Bloodstained

stained with blood:
a bloodstained knife.
guilty of murder, slaughter, or bloodshed.
Contemporary Examples

Bruce Davidson’s True Grit Philip Gefter November 4, 2009
Lord Lucan May Be Alive and in Africa, Says Brother Tom Sykes February 24, 2012
Jackie O’s Dark Side Eleanor Clift September 12, 2011
Inside the Gaza Schoolyard Massacre Jesse Rosenfeld July 25, 2014
The Walking Dead’s Explosive Midseason Finale Pitted Rick vs. The Governor Melissa Leon December 1, 2013

Historical Examples

A Soldier of the Legion C. N. Williamson
War and Peace Leo Tolstoy
The Mystery of Carlitos Helen Randolph
Storm Over Warlock Andre Norton
The Thirsty Sword Robert Leighton

adjective
stained by or covered in blood

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Bloodstock
racehorses of Thoroughbred breeding, taken as a whole. Contemporary Examples Queen’s Horse Tests Positive For Morphine Tom Sykes July 21, 2014 Historical Examples Berry And Co. Dornford Yates Berry And Co. Dornford Yates Berry And Co. Dornford Yates Punch, or the London Charivari, Vol. 152, June 27, 1917 Various Punch, or the London Charivari, Vol. […]
Bloodstone
a greenish variety of chalcedony with small bloodlike spots of red jasper scattered through it. Historical Examples Burroughs’ Encyclopaedia of Astounding Facts and Useful Information, 1889 Barkham Burroughs Chats on Old Clocks Arthur Hayden Bookbinding, and the Care of Books Douglas Cockerell A Dictionary of Arts, Manufactures and Mines Andrew Ure Birds and Nature Vol. […]
Bloodstream
the blood flowing through a circulatory system. Contemporary Examples The Super Bowl May Harm Your Masculinity Arthur De Vany February 2, 2011 The ‘HIV-Cured Baby’ Distorts Hope Kent Sepkowitz March 6, 2014 This Amoeba Eats Your Brain: Naegleria Fowleri Rattles New Orleans Kent Sepkowitz September 22, 2013 ‘Archer Creator Adam Reed on ‘Vice,’ Season 6’s […]

Blood-substitute
noun a substance such as plasma, albumin, or dextran, used to replace lost blood or increase the blood volume
Bloodsucker
any animal that sucks blood, especially a leech. an extortioner or usurer. sponger (def 2). noun an animal that sucks blood, esp a leech or mosquito a person or thing that preys upon another person, esp by extorting money n.