Term: umbra: a region of complete shadow resulting from total obstruction of light
Broader: shadow: shade within clear boundaries | Unrelated: ammonium nitrate: used as an explosive and fertilizer and rocket propellant
Broader: shadow: shade within clear boundaries | Unrelated: plaintiveness: expressing sorrowfulness
Broader: shadow: shade within clear boundaries | Unrelated: campanulaceae: family of plants of the order Campanulales; in some classifications includes Lobeliaceae
Broader: shadow: shade within clear boundaries | Unrelated: paper: a medium for written communication
Broader: shadow: shade within clear boundaries | Unrelated: covariation: (statistics) correlated variation
Broader: shadow: shade within clear boundaries | Unrelated: resistance pyrometer: pyrometer that measures high temperatures by the resistance in a heated wire
Broader: shadow: shade within clear boundaries | Unrelated: endoskeleton: the internal skeleton; bony and cartilaginous structure (especially of vertebrates)
Broader: shadow: shade within clear boundaries | Unrelated: temporal bone: a thick bone forming the side of the human cranium and encasing the inner ear
Broader: shadow: shade within clear boundaries | Unrelated: timber hitch: a hitch used to secure a rope to a log or spar; often supplemented by a half hitch
Broader: shadow: shade within clear boundaries | Unrelated: riot gun: a firearm designed to disperse rioters rather than to inflict serious injury or death