The term "lunar bone" refers to one of the carpal bones located in the human wrist. Also known as the semilunar bone, it is characterized by its moon-like shape and plays a crucial role in wrist movement. Synonyms for the term "lunar bone" can include the triquetrum or ulnare bone, reflecting its triangular shape and positioning near the ulna bone. Additionally, it may be referred to as the pyramidal bone due to its resemblance to a pyramid. These alternative names can be used interchangeably to describe this vital bone within the wrist, aiding in comprehension and communication in the field of anatomy.