noun
: the oxygen used in meeting the metabolic needs of aerobic microorganisms in water rich in organic matter (as water polluted with sewage) — called also biological oxygen demand
noun
: the oxygen used in meeting the metabolic needs of aerobic microorganisms in water rich in organic matter (as water polluted with sewage) — called also biological oxygen demand
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012