The spelling of the term "venae cavernosae penia" has a complex relationship with its pronunciation, which can be explained using the International Phonetic Alphabet (IPA). The word is pronounced /vɛˈni kərˈvɛnoʊsi ˈpiːniə/ and features multiple vowel sounds and syllables. The "ae" in "cavernosae" is pronounced as a combined long e and a sound, while "penia" ends with an unstressed schwa sound. Overall, the spelling reflects the Latin roots of the terms and the sound changes that occurred during their adaptation into English.
The cavernous venous spaces in the erectile tissue of the penis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.