The plica semilunaris of conjunctiva, also known as the semilunar fold, is a small crescent-shaped fold in the inner corner of the eye. Due to its small size and obscure nature, there aren't many synonyms for this anatomical feature. However, it may be referred to simply as the semilunar fold or even as the caruncula lacrimalis. This medical term may be confusing to those outside the field, but it is an important anatomical structure that helps to protect the eyes from foreign objects and assists in tear production. Understanding the various names for this structure can help in more effective communication with medical professionals.