noun, noun or participle which takes 'suru', transitive verb, intransitive verb
blood donation
Refers to the act of donating blood, often used in medical or volunteer contexts. Can be used as a noun or with する as a transitive/intransitive verb.
献血ルームで供血する。
I donate blood at the blood donation room.
供血は命を救う行為です。
Blood donation is an act that saves lives.
献血 is the more common term for blood donation in everyday Japanese. 供血 is a technical or formal synonym often used in medical contexts.
Compound of 供 (provide, offer) and 血 (blood). The exact historical derivation is uncertain, but the meaning is transparent from the kanji.