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  • noun

Words related to venipuncture

(medicine) puncture of a vein through the skin in order to withdraw blood for analysis or to start an intravenous drip or to inject medication or a radiopaque dye

References in periodicals archive ?
And that's how you add fractions with the butterfly method.
Your butterfly method is not necessarily a bad way to help remember how to add fractions.
I guess the butterfly method is just a way to keep track of stuff when you're finding the least common multiple of the denominators.
But before we move on, are you sure the butterfly method always works?
So the butterfly method doesn't always give you the fraction in smallest form.