noun
blood drive; blood donation campaign
Refers to an organized effort to collect blood donations, often by the Red Cross or similar organizations.
今週、駅前で献血運動が行われている。
A blood drive is being held in front of the station this week.
献血 refers to the act of donating blood itself, while 献血運動 is the organized campaign or drive to collect donations.
Compound of 献血 (blood donation) and 運動 (movement, campaign).