Ultimisternal is an uncommon anatomical term used to refer to the last sternum bone in the chest of a bird or reptile. The word is comprised of three morphemes - ultimi, stem, and sternal. The first morpheme ultimi means "last", the second morpheme stem refers to a central supporting structure or axis, and the third morpheme sternal refers to the sternum bone. The IPA phonetic transcription for this word is /ˌʌltɪˈmɪstənəl/.
Ultimisternal is an adjective used to describe a specific anatomical feature or structure found in certain organisms, most notably in vertebrates. The term derives from the Latin word "ultimus," meaning last, and "sternum," which refers to the breastbone or the central bone structure of the chest.
Ultimisternal is used to describe a bone or cartilaginous structure in an organism that is located at the outermost or caudal end of the sternum. It is the final or terminal component of the sternum, situated farthest from the organism's head. In some cases, the ultimisternal element may be separate and distinct from the rest of the sternum, while in others it may be continuous with it.
This term is commonly used in studies of comparative anatomy and biology, as well as in practical applications such as medical research and paleontology, where understanding the structure and development of the sternum in different organisms is important.
The ultimisternal feature varies significantly between species, and its shape, size, and composition can provide valuable information about the evolutionary relationships and adaptations of different organisms. Therefore, its analysis and study contribute to our understanding of the diversity and classification of vertebrates.
Relating to the xiphoid cartilage or lowest segment of the sternum.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.