The word "metrocystosis" is spelled with six syllables: /ˌmɛtrəʊˌsɪsˈtoʊsɪs/. The first syllable is "met-", rhyming with "let" and "bet". The second syllable is "-ro-", pronounced with a long "o" sound like "low". The third and fourth syllables are "-cys-to-", with "cys" rhyming with "kiss" and "to" like "toe". Finally, the fifth and sixth syllables are "-sis", with "sis" pronounced like the female name "Cecis". This word refers to the presence of cysts in the uterus.
The formation of uterine cysts.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.