IPA: /ˌpɒlɪˈdɪspəˌsɪti/
KK: /pɑːlɪˈdɪspərsɪti/
A measure of how varied the sizes of particles are in a mixture or solution.
The polydispersity of the sample indicates a wide range of particle sizes.
Polydispersity → It is formed from "poly-" (meaning many) and "dispersus" (from Latin, meaning scattered or spread out) and the suffix "-ity" (meaning the state or condition of). The word "polydispersity" refers to the condition of having many different sizes or distributions within a sample.
Think of 'many' ('poly-') things that are 'scattered' ('dispersus') to remember that polydispersity means a variety of sizes or distributions.