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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site head A unit of pressure for a fluid, commonly used in water pumping and hydro power to express height a pump must lift water, or the distance water falls. Total head accounts for friction head losses, etc. Related categories    • WATER POWER Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP