Monodactyly is a term used in biology to describe the presence of a single digit or toe. There are a few different synonyms for this term, which can be helpful when trying to describe the condition in different contexts. Some synonyms include unidactyly, monodactylism, and monodactylia. These words all refer to the same basic concept of a single digit, and can be used interchangeably. In certain cases, one synonym may be more appropriate than another depending on the specific context or audience. Regardless of the terminology used, monodactyly is an interesting biological trait that is relatively rare and can occur in a variety of different organisms.