Phaser can refer to:

• Phaser (fictional weapon), in the Star Trek fictional universe, a beam weapon commonly used by Starfleet
• Phaser (effect), in electronics, an audio signal processor used to distort the signal
• Light Phaser, a lightgun for the Sega Master System video game system
• Xerox Phaser, Xerox's trade name for makes of thermal transfer printers, solid ink printers and color laser printers
• The Personnel Halting and Stimulation Response rifle (PHASR), a dazzler weapon
• Phaser, an insecticide produced by Bayer CropScience containing the active ingredient endosulfan
• Phaser^® Digital Power Transducer from Second Wind

See also:

• Phase (disambiguation)
• Phasor
• FASOR

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