Autofluorescence is a term that describes the natural process of a substance emitting light under certain conditions. Synonyms for autofluorescence include self-fluorescence, auto-luminescence, self-luminosity, and self-illumination. These terms may be used interchangeably depending on the context of the discussion, but they all describe the same phenomenon. Autofluorescence is a widely studied phenomenon in various fields, including biology, chemistry, and materials science. Scientists use this phenomenon to study the molecular and structural properties of a wide range of biological samples, including cells, tissues, and organisms. The use of synonyms helps to clarify the meaning of the term and enhance communication between researchers in different fields.