The red fluid that circulates in the heart and blood vessels; used in formal contexts, compounds, or when used alone in spoken language.

(bound form) blood vessels such as arteries and veins; veins found in leaves or insect wings; a geological or biological structure that branches out, such as a mountain range or a mineral vein

(bound form) Relating to kinship or ancestry by birth.

(bound form) an interconnected sequence or system, such as a family bloodline or a train of thought