Definition of "addling" [addling]

• Causing fertilised eggs to lose viability, by killing the developing embryo within through shaking, piercing, freezing or oiling, without breaking the shell. (noun)
• Present participle of addle. (verb)

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• "In April, volunteers also identified nests and coated recently laid eggs with oil, a process called addling that halts the egg's development."
• "The population, which numbered 4,000 a decade ago, has been reduced to fewer than 500 by "addling" the birds 'eggs so they will not hatch and by killing some."
• "I think he probably uses rubber cement to do his hair ... it's the fumes addling his neocon brain."