The word "archocystosyrinx" is a complex term used to describe a rare medical condition. The word can be divided into three parts, "archo," "cysto," and "syrinx." "Archo" comes from the Greek word "arkhos," meaning "first in rank," while "cysto" comes from the Greek "kystis," meaning "bladder." "Syrinx" comes from the ancient Greek musical instrument, the syrinx. The word is pronounced /arkoʊsɪstoʊsɪrɪŋks/ and is spelled according to the International Phonetic Alphabet (IPA) guidelines.
A rectovesical fistula.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.