- the dried bulb of white varieties of a plant (Urginea maritima) of the lily family, formerly used in medicine
- this plant
sea onionsea onion
- The squill Urginea maritima, whose bulb yields a powder used as a rat poison and formerly used medicinally.
- Any of various similar bulbous plants.
(plural sea onions)
- Drimia maritima, the sea squill.