Definitions

1. noun

A disease of birds, especially chickens, characterized by the infiltration of white blood cells into the organs and tissues.

“The farmer noticed that his chickens were suffering from leucosis, which led him to take them to the veterinarian.”

2. noun

A type of bone marrow disease in humans, also known as leukemia, characterized by an excessive production of white blood cells.

“The patient was diagnosed with leucosis, a type of blood disorder that required immediate medical attention.”