A form of electromagnetic communication in which the signal frequency or bandwidth is spread beyond that required, rendering it more difficult to intercept or jam, or to send multiple signals over the same band

(pharmacology) Any antibiotic that is active against a wide range of bacteria, especially against both gram-positive and gram-negative bacteria.

(military) Dominance of the battlespace to permit conduct of joint operations with neither effective counterattack nor resistance.

Alternative form of full-spectrum superiority

plural of spread spectrum communication

plural of autistic spectrum disorder

(physics) A spectrum produced by a diffraction grating whose adjacent slits are one wavelength apart.

plural of autism spectrum disorder

(psychology, pathology) A disorder involving any of a range of psychological conditions, all characterized by abnormal social interaction and communication, restricted interests, highly repetitive behaviour, and eccentricity.

(medicine) Any of a spectrum of birth defects and developmental disorders, including fetal alcohol syndrome, occurring in a person exposed to alcohol during pregnancy.