- covering, natural covering, cover - a natural object that covers or envelops; "under a covering of dust"; "the fox was flushed from its cover"
--1 is a kind of natural object
--1 has particulars:scale; shell; test; body covering; sheath, case; integument; blanket, mantle; crust, incrustation, encrustation; envelope; indumentum, indument; shell; shell, eggshell; skim; slough; snowcap; vesture; peridium; pericarp, seed vessel; perianth, chlamys, floral envelope, perigone, perigonium; theca, sac; indusium; bark