alkaline phosphatase
noun
: any of the phosphatases that are optimally active in alkaline medium and occur in especially high concentrations in bone, the liver, the kidneys, and the placenta
Example Sentences
Recent Examples on the Web Strensiq replaces a deficient enzyme, alkaline phosphatase, and allows the bones to mineralize. 
New York Times, 25 Aug. 2019 So Halámek and his team focused on levels of alkaline phosphatase (ALP), an enzyme found in blood, to determine age. National Geographic, 29 June 2016
New York Times, 25 Aug. 2019 So Halámek and his team focused on levels of alkaline phosphatase (ALP), an enzyme found in blood, to determine age. National Geographic, 29 June 2016 Word History
First Known Use
1935, in the meaning defined above
Medical Definition
alkaline phosphatase
noun
: any of the phosphatases that are enzymes active chiefly in alkaline medium and occur in especially high concentrations in bone, the liver, the kidneys, and the placenta compare acid phosphatase
Normally, blood levels of alkaline phosphatase, which are a measure of bone cell growth and bone rebuilding, begin declining with age and remain very low throughout old age. Sally Squires, The Washington Post
Sally Squires, The Washington PostNote: A test measuring the level of alkaline phosphatase in the blood serum is an important diagnostic indicator for diseases especially of the bone, liver, gallbladder, and bile ducts.