infra
Latin for under
Infra is a Latin term meaning "below" or "beneath," used in formal writing to refer to something that appears later in a text: see infra, page 42.
It's the opposite of supra, which points to earlier material.
Outside legal and academic writing, infra appears mainly as a prefix meaning below or within: infrastructure, infrared, infrasound.
In position below
- beneathIn a lower position
- lowerReduce or move downward
- subordinateOne lower in rank
- inferiorOf lower rank
secondary · lesser · junior · ancillary · minor · subservient · dependent · auxiliary
Organized sets of elements
- networksInterconnected groups or channels
- utilitiesEssential infrastructure services
- roadsPaved paths for vehicles
- bridgesStructures spanning obstacles
sewers · pipelines · telecommunications · grid · public works · facilities · services · backbone
Pertaining to warmth
- heatTransferred thermal energy
- radiationEnergy propagation through space
- wavelengthSpatial repetition interval
- spectrumContinuous range of values
night vision · thermography · remote sensing · thermal imaging · heat signature · spectroscopy · emission · absorption
Occurring seldom or rarely
- subsonicBelow sound's speed
- whale songCetacean acoustic communication
- seismicRelating to ground tremors
- vibrationRapid oscillating movement
inaudible · atmospheric · thunder · volcanic · earthquake detection · animal communication · pressure waves
underneath
In position below
- beneathIn a lower position
- lowerReduce or move downward
- subordinateOne lower in rank
inferior · secondary · lesser · junior · ancillary · minor · subservient · dependent · auxiliary · subsidiary
systems
Organized sets of elements
- networksInterconnected groups or channels
- utilitiesEssential infrastructure services
- roadsPaved paths for vehicles
bridges · sewers · pipelines · telecommunications · grid · public works · facilities · services · backbone · framework
thermal
Pertaining to warmth
- heatTransferred thermal energy
- radiationEnergy propagation through space
- wavelengthSpatial repetition interval
spectrum · night vision · thermography · remote sensing · thermal imaging · heat signature · spectroscopy · emission · absorption
infraorbital
Below the eye socket
low-frequency
Occurring seldom or rarely
- subsonicBelow sound's speed
- whale songCetacean acoustic communication
- seismicRelating to ground tremors
vibration · inaudible · atmospheric · thunder · volcanic · earthquake detection · animal communication · pressure waves
infrasupra
Above, in documents
above · ante · previously · hereinabove · beforehand
- infrastructure projectPlanned construction of essential systems
- infrastructure developmentBuilding essential shared systems
- internet infrastructureSystems enabling web connectivity
- community infrastructureShared physical systems serving residents
- infrared lightElectromagnetic waves below red
- infrared detectionIdentifying heat radiation sources
infrastructure, infrared, infrastructures, infrangible, infrasonic