The correct spelling of the phrase "Agnina membrana" can be tricky due to its Latin origin. According to IPA phonetic transcription, "Agnina" should be pronounced as /æɡ.ni.nə/ and "membrana" as /mɛm.ˈbra.nə/. The first word has a soft "g" sound, while the second one has a stressed second syllable. In English, this phrase translates to "sheepskin membrane" and often refers to a type of thin leather used for music instrument parts or bookbinders' gilding.