Charcot-Leyden crystals are microscopic crystals that are commonly found in various types of blood, tissues, and in certain types of body fluids. These crystals have been linked to various illnesses and conditions, including asthma, pneumonia, and parasitic infections. There are several synonyms that may be used to refer to these crystals, including eosinophil crystals, crystallized eosinophils, and Charcot globules. These terms are often used interchangeably with Charcot-Leyden crystals, particularly in medical and scientific literature. While they may differ in their exact origin or composition, they are all generally considered to be indicative of an underlying medical issue that requires further investigation and treatment.