1. an abnormal increase in the number of white blood cells in the blood; leukemia or a related blood disorder
Usage: medical term; also spelled leukosis in some contexts; often used in veterinary medicine to describe viral infections in animals
2. in veterinary medicine, a viral disease affecting poultry and other animals, characterized by abnormal cell growth
Usage: veterinary term; avian leucosis is a common form in chickens

Examples

• The patient was diagnosed with leucosis after blood tests revealed elevated white cell counts.
• Leucosis in chickens can significantly reduce egg production and overall flock health.
• The veterinarian explained that avian leucosis is transmitted between birds through contact.
• Treatment options for leucosis depend on the underlying cause and type of disease.
• Leucosis is characterized by the proliferation of abnormal white blood cells.