From Longman Dictionary of Contemporary Englishcygnetcyg‧net /ˈsɪɡnɪt/ noun [countable] HBBa young swan
Examples from the Corpus
cygnet• This cygnet has a broken leg.• Next stop Goring, with plenty more unsuspecting cygnets to find along the way.• A pair of swans cruised, with cygnets, and swallows were zipping to and fro above the water.Origin cygnet (1400-1500) Old French cygne “swan”, from Latin cygnus 