siren

1. One of a group of nymphs who lured mariners to their death on the rocks.
2. One who sings sweetly and charms.
3. A dangerously seductive woman.
4. A member of Sirenia, an order of mammals.
5. A member of a genus of aquatic salamanders of the family Sirenidae, commonly used for all species in the family Sirenidae.
6. Any of various nymphalid butterflies of the genus Hestina.
7. A device, either mechanical or electronic, that makes a piercingly loud sound as an alarm or signal, or the sound from such a device.
8. A musical instrument, one of the few aerophones in the percussion section of the symphony orchestra (patented as Acme Siren in 1895).

Plural sirens