The polymer is irregular, aperiodic -there's no single component which simply repeats.
2
Modeling and experimental results of an ultrasonic aperiodic flat lens for use in air are presented.
3
Blood sampling caused short aperiodic spikes in the proportion of reticulocytes which appear to have a different developmental pathway than normal reticulocytes.
4
The ancient Orithenans suspected, but didn't know how to prove, that the tiles of the Teglon were aperiodic: that no pattern would ever repeat.