Circulator

noun

1. One who or that which circulates: specifically applied to a circulating decimal fraction. See decimal.
2. A juggler; a mountebank; one who goes about showing tricks.
3. A function of two whole numbers, a variable, q, and a period, a, of the form where aq, etc., are circulating elements, and A0, etc., are numerical coefficients. Also called circulating function.
4. One who, or that which, circulates.
5. A person or thing that causes something to circulate