The correct spelling of the word "melanosity" is [muh-lan-OS-i-tee]. The first syllable, "muh", is pronounced with a short "u" sound followed by a long "a" sound in "lan". The emphasis is on the third syllable, "OS", which is pronounced with a long "o" sound followed by a short "s" sound. The final syllable, "i-tee", is pronounced with a long "e" sound followed by a soft "t" sound and a short "i" sound. This word refers to the amount or quality of melanin in an organism.
Darkness of complexion.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.