[co.coon] n [F cocon, fr. Prov coucoun, fr. coco shell, prob. fr. L coccum kermes (thought to be a gall or berry), fr. Gk kokkos berry, kermes] (1699) 1 a: an envelope often largely of silk which an insect larva forms about itself and in which it passes the pupa stage b: any of various other protective coverings produced by animals
2. a: a covering suggesting a cocoon b: a protective covering placed or sprayed over military or naval equipment in storage
[2]cocoon vt (1881): to wrap or envelop in or as if in a cocoon