The spelling of the word "Fermillet" can be confusing due to its French origin. In IPA phonetic transcription, it is pronounced as [fɛrmɪjɛt]. The first two sounds "ferm" are pronounced as the English word "firm", while the last three sounds "il-let" are pronounced as "ee-yet". Therefore, the correct spelling of the word is "Fermillet" and not "Fermilet" or "Fermillet". The word refers to a French physician and anatomist, Jean Baptiste Marc Bourgery's assistant, who contributed to the creation of a medical atlas.