Definition that contains infra
- penalty (games) a handicap or disadvantage that is imposed on a competitor (or a team) for an infraction of the rules of the game
- microwave a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data
- infrared the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
- supercomputer a mainframe computer that is one of the most powerful available at a given time
- stinger a portable low altitude surface-to-air missile system using infrared guidance and an impact fuse; fired from the shoulder
- herschel English astronomer (born in Germany) who discovered infrared light and who catalogued the stars and discovered the planet Uranus (1738-1822)
- sidewinder air-to-air missile with infrared homing device
- thermograph medical instrument that uses an infrared camera to reveal temperature variations on the surface of the body
- infrared therapy the use of infrared radiation (as by infrared lamps or heating pads or hot water bottles) to relieve pain and increase circulation to a particular area of the body
- flnc a terrorist group formed in 1976 to work for Corsican independence; attacks on Corsica are aimed at sabotaging public infrastructure and symbols of colonialism