The spelling of the word "pimelopterygium" can be confusing, but it can be broken down using the International Phonetic Alphabet (IPA) phonetic transcription. The word is pronounced /pɪˌmɛlɒptəˈrɪdʒiəm/, which helps understand the spelling of the word. The "pime-" prefix is followed by the "-lopterygium" suffix, which refers to the fin of a fish. Despite its tricky spelling, this scientific term helps biologists describe the anatomy of fish in precise detail.
A pterygium containing fat, composed in part of fatty tissue.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.