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BNC: 39691 COCA: 22155
BNC: 39691 COCA: 22155

infra

1 of 2

adverb

in·​fra ˈin-frə How to pronounce infra (audio)
 also  -ˌfrä
: later in this writing : below
for additional examples see infra

infra-

2 of 2

prefix

1
: below
infrahuman
infrasonic
2
: within
infraspecific
3
: below in a scale or series
infrared

Word History

Etymology

Adverb

Latin

Prefix

Latin infra — more at under

First Known Use

Adverb

circa 1740, in the meaning defined above

Time Traveler
The first known use of infra was circa 1740
BNC: 39691 COCA: 22155

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