_:b668235635 "Mosby:Mosbys_Dental_Dictionary--2nd_Ed"^^ . _:b668235635 "Collins:Collins_Online_English_Dictionary"^^ . _:b668235635 . _:b668235635 . _:b668235635 "Calculated measurement of a difference in the maximum arterial blood pressure, that is the pressure at the point of maximal contraction of the heart, between two points in time or two conditions expressed as a number (positive or negative), not as a ratio or percentage relative to another quantity."^^ . _:b668235635 . _:b668235635 .