The word "carcerule" is a rare term that is not found in most dictionaries. It refers to a small prison or jail cell. The pronunciation of this word can be broken down using the International Phonetic Alphabet (IPA) as /kɑrsəˌruːl/. The first part of the word, "carce," is pronounced with a long "a" sound and the second part, "rule," is pronounced with a long "u" sound. Though not commonly used, "carcerule" can serve as a unique and specific term for a small prison cell.
In bot., a dry, indehiscent, many-celled fruit, with few seeds in each cell, the cells cohering round a common style placed in the axis.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.