plural of cycad blue

A lycaenid butterfly, Theclinesthes onycha, of Australia, the larvae of which feed on cycads. / A lycaenid butterfly, Luthrodes pandava, of Asia, the larvae of which feed on cycads.

out of the blue

(physics) a situation in which the frequency is higher ("bluer") than the resonance frequency

(chiefly UK) A permanent sign installed in a public place to commemorate a historical link between that location and a famous person, event, or former building on the site.

plural of blue plaque

Sporting colours awarded by a university or other institution for the highest level of sporting achievement, especially and originally at Oxford and Cambridge Universities in England; contrasted with half blue.

Sporting colours awarded by a university or other institution for sporting achievement at a lower level, or in a more minor sport, than that required to receive a full blue, especially and originally at Oxford and Cambridge Universities in England.

(historical) A foreign exchange certificate issued to visitors to North Korea from capitalist countries.

plural of blue bag