acid-base balance

noun
\ ˌas-əd-ˌbās- \
variants: also acid/base balance

Medical Definition of acid-base balance 

: the state of equilibrium between proton donors and proton acceptors in the buffering system of the blood that is maintained at approximately pH 7.35 to 7.45 under normal conditions in arterial blood

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to deposit or conceal in a hiding place

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