Term: protective covering: the tough natural covering of some organisms
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: menopause: the time in a woman's life in which the menstrual cycle ends
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: sphenisciformes: penguins
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: nude dancing: erotic dancing with little or no clothing
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: rejection: the act of rejecting something
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: orphan: a child who has lost both parents
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: pillion: a seat behind the rider of a horse or motorbike etc.
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: toona: formerly included in genus Cedrela
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: boundary: a line determining the limits of an area
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: tamias: chipmunks of eastern North America
Broader: object: a tangible and visible entity; an entity that can cast a shadow | Unrelated: biosafety level 3: exposure to infectious agents that can be transmitted by the respiratory route and which can cause serious infection