caparazón

carapace (a hard protective covering of bone or chitin, especially one which covers the dorsal portion of an animal); caparison; shell

Inherited from Old Spanish caparaçón (mid-15th century), from Old Occitan capairon; or alternatively from the ancestor of Mistralian Provençal caparasso (“large cape with hood”) + -ón; both ultimately from Late Latin cappa (“cape”).