Metreurysis is a medical term that refers to the abnormal relaxation of the cervix during pregnancy that results in premature delivery. The spelling of the word can be explained through IPA phonetic transcription as /mɛtrjuˈrɪsɪs/. The first syllable, "metr," refers to the uterus, while "eurysis" is derived from the Greek word "euruo," which means to dilate or stretch. The "ysis" ending indicates a process or action, resulting in the meaning of the word - the process of the uterus dilating prematurely.
Dilatation of the cervix uteri.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.