Learn how to say Mousseline correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word mousseline:
1 [mass noun] a very fine, semi-opaque fabric similar to muslin:
a silk mousseline camisole
2a soft, light sweet or savoury mousse.
3 (also sauce mousseline) [mass noun] hollandaise sauce that has been made frothy with whipped cream or egg white, served mainly with fish or asparagus.
late 17th century: from French (see muslin)