No. The hepatitis B vaccine series should not berestarted when doses are delayed; rather, the seriesshould be continued from where it left off. Thevaccine recipient should receive the second doseof vaccine now and the third dose 2â5 monthslater.
The symbol used by mathematicians to represent the ratio of a circle's circumference to its diameter is the lowercase Greek letter Ï, sometimes spelled out as pi, and derived from the first letter of the Greek word perimetros, meaning circumference. In English, Ï is pronounced as pie (/paÉª/, paÉª).
Freebase(0.00 / 0 votes)Rate this definition: pi. The number pi is a mathematical constant that is the ratio of a circle's circumference to its diameter, and is approximately equal to 3.14159. It has been represented by the Greek letter Ï since the mid-18th century, though it is also sometimes written as pi.