nonvisible
Not able seen
Nonvisible means not able to be seen—either because something is hidden, too small, or outside the range of human perception.
Nonvisible light includes infrared and ultraviolet wavelengths.
The crack was nonvisible to the naked eye.
The word is more technical than invisible, which often implies magical or supernatural concealment.
Smaller than atoms
- molecularOf tiny particles
- atomicOf elemental particles
- cellularComposed of small units
- bacterialOf or from germs
viral · nanoscale · microscopic · infinitesimal · minute · particulate · microorganism · spore
Wavelengths shorter than violet
- infraredHeat-bearing electromagnetic waves
- gamma-rayHighest-energy electromagnetic wave
- radio waveElectromagnetic broadcast frequency
- microwaveRadiation-based kitchen heater
electromagnetic · dark matter · dark energy · cosmic ray · neutrino · gravitational wave · magnetic field · radiation
Made invisible deliberately
- obscuredMade hard to perceive
- veiledConcealed or obscured
- shroudedCovered and hidden
- cloakedConcealed or covered
masked · buried · covered · secreted · tucked away · out of sight · behind the scenes · under wraps
Not physically present
- conceptualOf or relating to ideas
- theoreticalBased on hypothesis, untested
- metaphysicalBeyond the material realm
- philosophicalConcerned with fundamental truths
ideational · notional · immaterial · incorporeal · nonphysical · mental · cognitive · psychological
Concealed from authorities
- secretiveInclined to conceal
- undercoverSecretly engaged in espionage
- furtiveSecretive and sly
- surreptitiousDone secretly, avoiding detection
stealthy · incognito · covert · classified · confidential · undisclosed · off the record · hush-hush
Resembling a specter
- spectralGhostlike or wavelength-related
- phantomInsubstantial apparition
- apparitionalResembling a specter
- wraithlikeResembling a ghost
spiritual · paranormal · otherworldly · ethereal · disembodied · haunting · poltergeist · specter
subatomic
Smaller than atoms
bacterial · viral · nanoscale · microscopic · infinitesimal · minute · particulate · microorganism · spore · pollen
ultraviolet
Wavelengths shorter than violet
- infraredHeat-bearing electromagnetic waves
- gamma-rayHighest-energy electromagnetic wave
- radio waveElectromagnetic broadcast frequency
microwave · electromagnetic · dark matter · dark energy · cosmic ray · neutrino · gravitational wave · magnetic field · radiation · wavelength
concealed
Made invisible deliberately
cloaked · masked · buried · covered · secreted · tucked away · out of sight · behind the scenes · under wraps · camouflaged
intangible
Not physically present
- conceptualOf or relating to ideas
- theoreticalBased on hypothesis, untested
- metaphysicalBeyond the material realm
philosophical · ideational · notional · immaterial · incorporeal · nonphysical · mental · cognitive · psychological · spiritual
clandestine
Concealed from authorities
- secretiveInclined to conceal
- undercoverSecretly engaged in espionage
- furtiveSecretive and sly
surreptitious · stealthy · incognito · covert · classified · confidential · undisclosed · off the record · hush-hush · underground
ghostly
Resembling a specter
- spectralGhostlike or wavelength-related
- phantomInsubstantial apparition
- apparitionalResembling a specter
wraithlike · spiritual · paranormal · otherworldly · ethereal · disembodied · haunting · poltergeist · specter · shade
nonvisiblevisible
Able to be seen
seen · observable · perceptible · discernible · apparent
vision, visible, television, visual, invisible, revise, supervise, visor, visibly