The term 'cocoon, for example' can be summarized by the crossword solution 'PUPA, ' which is a four-letter word. PUPA is the stage of development in the life cycle of some insects, such as butterflies and moths, between the larval and adult stages. During this stage, the insect is encased in a protective covering, or cocoon, which is made of silk or other materials. This covering protects the PUPA from predators and environmental hazards while it undergoes metamorphosis into its adult form.