Small particles of plastic (typically less than 5 mm) produced by the degradation of plastic products, found in high levels in the marine environment and increasingly throughout all environments and in food and drinks.

Exhibiting microplasticity.

plural of microplastic

(physics) The property of a solid body whereby it shows plasticity (undergoes permanent change due to stress) in local areas while globally showing elasticity (maintaining the ability to return to its original shape and size).