lusus naturae
- n a person or animal that is markedly unusual or deformed
lustre
- n a surface coating for ceramics or porcelain
- n a quality that outshines the usual
- n the visual property of something that shines with reflected light
lustrelessness
- n the property of having little or no contrast; lacking highlights or gloss
lustrum
- n a period of five years
- n a ceremonial purification of the Roman population every five years following the census