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yellow flag - 4 dictionary results

yellow flag

–noun
1. Nautical. quarantine flag.
2. water flag.

Origin:
1775–85

quarantine flag

–noun Nautical.
a yellow flag, designating the letter Q in the International Code of Signals: flown by itself to signify that a ship has no disease on board and requests a pratique, or flown with another flag to signify that there is disease on board ship.
Also called yellow flag.


Origin:
1870–75

water flag

–noun
a European iris, Iris pseudacorus, naturalized throughout eastern North America, with blue-green leaves and violet-veined, yellow flowers and growing in moist places.
Also called yellow flag.


Origin:
1570–80

Main Entry: yellow flag
Pronunciation: -'flag
Function: noun
: QUARANTINEFLAG
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