The spelling of the word "prorsal" can be explained using the International Phonetic Alphabet (IPA). The first part, "pro," is pronounced as /proʊ/, with a long o sound. The second part, "rsal," is pronounced as /ɹsæl/, with the r and s sounds coming together to form a unique sound. Together, the word is pronounced as /proʊɹsæl/. "Prorsal" is a rare term which means "belonging to the forepart of the body."
Toward the front, anterior.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.