The bulb is an archaic term for the medulla oblongata and in modern clinical usage the word bulbar (as in bulbar palsy) is retained for terms that relate to the medulla oblongata, particularly in reference to medical conditions.
Pi is transcendental. The endless number cannot be expressed by any algebraic equation. No pattern has been found in its digits, Yet it cannot be proven in a finite amount of time. That no pattern exists in an infinite number of digits. Pi goes beyond our reality.
Pi is equal to the circumference of a circle divided by the diameter of that circle. It is a transendental number, meaning that it can not be exactly expressed by any equation with rational coefficients and powers. The best approximation using a two-digit fraction is 22/7.