blue cap
/ˌbluː ˈkap/noun
1 Military slang (now historical ). Originally: a soldier belonging to the Royal Madras Fusiliers; (later) a soldier belonging to the Royal Dublin Fusiliers.
- The Royal Dublin Fusiliers was formed in 1881 by the amalgamation of The Royal Madras Fusiliers and the Royal Bombay Fusiliers. The regiment was disbanded in 1922..
2Chiefly English regional. The cornflower, Centaurea cyanus. Now rare.
3A bluish layer in a flame; specifically (Mining ) a circle of bluish flame appearing above and around the wick of a safety lamp, indicating the presence of explosive gases. Compare cap. Now rare.
Origin
Late 16th century (in an earlier sense). From blue + cap.
- Falla, Manuel de
- fall apart (or to pieces)
- fall at the first hurdle
- fallaway
- fall back
- fallback
- fall back on
- fallback position
- fall behind
- fall between two stools
- fall by the wayside
- Fall Classic
- fall down
- fallen
- fallen angel
- fallenness
- faller
- fallfish
- fall flat
- fall flat on one's face
- fall for
- fall foul (or afoul) of
- fall from grace
- fall guy
- fallibilism