cygnet
Concise Oxford English Dictionary © 2008 Oxford University Press:
cygnet /ˈsɪgnɪt/
▶noun a young swan.
– origin ME: from Anglo-Norman Fr. cignet, dimin. of OFr. cigne ‘swan’, based on L. cycnus, from Gk kuknos.
'cygnet' also found in these Oxford entries:

