Solenoid
From hyperspacewiki
A solenoid is a continuum that is homeomorphic to the inverse limit $\Sigma(\vec{p})=\varprojlim (S^1,f_n)$, where the bonding maps $f_n(z)=z^{p_n}$, where $\vec{p}=(p_1,p_2,\ldots)$ is a sequence of prime numbers.
