/moohs/ , n.
1. Cookery.
a. a sweetened dessert with whipped cream as a base, often stabilized with gelatin and chilled in a mold: chocolate mousse.
b. an aspic, unsweetened and containing meat, vegetables, or fish: salmon mousse.
2. a foamy preparation used on the hair to help hold it in place, applied usually to damp hair before grooming or styling and worked in until absorbed.
[ 1890-95; ]