[ 'halsɪən , -ʃ(ə)n ]
■ adjective denoting a past time regarded as idyllically happy and peaceful: the ~ days of the mid 1980s.
■ noun
1》 a mythical bird said to breed in a nest floating at sea, charming the wind and waves into calm.
2》 a tropical Asian and African kingfisher with brightly coloured plumage. [Genus Halcyon : many species.]
Origin
ME: via L. from Gk alkuōn 'kingfisher' (also halkuōn , by assoc. with hals 'sea' and kuōn 'conceiving').