Contains

• bark

  Tough protective covering of the woody stems and roots of trees and other woody plants.

• body covering

  Any covering for the body or a body part.

• shell

  The hard largely calcareous covering of a mollusc or a brachiopod.

• case

  An enveloping structure or covering enclosing an animal or plant organ or part.

• pericarp

  The ripened and variously modified walls of a plant ovary.

• chlamys

  Collective term for the outer parts of a flower consisting of the calyx and corolla and...

• scale

  A flattened rigid plate forming part of the body covering of many animals.

• incrustation

  A hard outer layer that covers something.

• shell

  The exterior covering of a bird's egg.

• blanket

  Anything that covers; "there was a blanket of snow".

• envelope

  A natural covering (as by a fluid); "the spacecraft detected an envelope of gas around...

• skim

  A thin layer covering the surface of a liquid; "there was a thin skim of oil on the water".

• vesture

  Something that covers or cloaks like a garment; "fields in a vesture of green".

• test

  A hard outer covering as of some amoebas and sea urchins.

• roof

  The inner top surface of a covered area or hollow space; "the roof of the cave was very high";...

• slough

  Any outer covering that can be shed or cast off (such as the cast-off skin of a snake).

• peridium

  Outer layer of the spore-bearing organ in many fungi.

• snowcap

  A covering of snow (as on a mountain peak).

• integument

  An outer protective covering such as the skin of an animal or a cuticle or seed coat...

• indumentum

  A covering of fine hairs (or sometimes scales) as on a leaf or insect.

• theca

  A case or sheath especially a pollen sac or moss capsule.

• indusium

  A membrane enclosing and protecting the developing spores especially that covering the...

• hood

  A protective covering that is part of a plant.

• shell

  A rigid covering that envelops an object; "the satellite is covered with a smooth shell of...