pantalets

pan·ta·let

also pan·ta·lette P0046500 (păn′tə-lĕt′)n. often pantalets or pantalettes1. Long underpants trimmed with ruffles extending below the skirt, worn by women and children in the mid-1800s.2. A frill attached to the leg of underpants.
[From pantaloon.]

pantalets

(ˌpæntəˈlɛts) or

pantalettes

pl n1. (Clothing & Fashion) long drawers, usually trimmed with ruffles, extending below the skirts: worn during the early and mid 19th century2. (Clothing & Fashion) a pair of ruffles for the ends of such drawers[C19: diminutive of pantaloons]

pan•ta•lets

or pan•ta•lettes

(ˌpæn tlˈɛts)

n. (used with a pl. v.) long drawers with fancy trimming on the lower legs, extending below the hem of a woman's skirt: worn in the 19th century.