TRACP (tartrate-resistant acid phosphatase) is an enzyme protein found predominantly in cells of the osteoclast lineage. It plays an essential role in bone resorption and remodeling, making it a key target for drugs aimed at treating bone-related disorders. Synonyms for TRACP include osteoclast-specific phosphatase 5 (OC-5), acid phosphatase 5, and purple acid phosphatase. These terms describe the specific function and molecular structure of the enzyme and are often used interchangeably in scientific literature and medical research. Understanding the various synonyms for TRACP can help researchers and healthcare professionals stay informed and up-to-date on the latest findings and treatments in bone health.