blue light

Noun

 * 1)  A mixture of chemicals (including nitre, sulfur and antimony) used in the eighteenth and nineteenth centuries for night-time signaling and general illumination.
 * 2)  A New England federalist, who opposed the Anglo-American War of 1812;, a federalist.
 * 3)  A flashing light, usually fitted to an emergency vehicle.
 * 4)  Visible light towards the blue end of the spectrum generated from the screen of an electronic device.
 * 1)  A New England federalist, who opposed the Anglo-American War of 1812;, a federalist.
 * 2)  A flashing light, usually fitted to an emergency vehicle.
 * 3)  Visible light towards the blue end of the spectrum generated from the screen of an electronic device.
 * 1)  Visible light towards the blue end of the spectrum generated from the screen of an electronic device.
 * 1)  Visible light towards the blue end of the spectrum generated from the screen of an electronic device.

Usage notes
The original chemical mixtures burned with a blue flame. Later versions omitted any colouring agents, producing a bright white light, but retained the name by convention.

Translations

 * Finnish: sininen valo, sinivalo
 * French:
 * Polish: elektryczne światło


 * Arabic: ضَوْء أَزْرَق
 * Finnish: hälytysvalo
 * German:
 * Hungarian: kék fény
 * Norwegian:
 * Bokmål: blålys
 * Nynorsk: blålys, blåljos

Verb

 * 1) To travel quickly in a police or ambulance vehicle with the lightbar (and possibly the siren) activated.

Hypernyms

 * See Thesaurus:move quickly