【化】 scum yeast
float; on the surface; unstable
【化】 flotation
film; membrane; theca; velamen; velum
【化】 membrane
【医】 coat; envelope; film; lemma; membranae membranae; membranae membrane
panniculus; theca; thecae; tunic; tunica; velamen; velamenta
velamentum
leaven; yeast; zyme
【化】 barm; yeast
【医】 barm; faex; fermentum