The measurement and study of blood flow velocity and speed through blood vessels.
From Greek 'hema' (blood) + 'tachy' (fast) + 'metry' (measurement), describing the medical practice of quantifying how quickly blood moves through the circulatory system.
In 1860, scientists realized that blood doesn't flow at the same speed everywhere—it zooms through arteries but slows to a crawl in tiny capillaries, which was revolutionary for understanding why capillaries are so good at delivering oxygen.
Complete word intelligence in one call. Free tier — 50 lookups/day.