noun, noun which may take the genitive case particle 'no'
invisibility; invisible
Technical or formal term for the state of being invisible or not visible. Often used in scientific, philosophical, or technical contexts.
不可視の光線には紫外線や赤外線がある。
Invisible light includes ultraviolet and infrared rays.
この物質は不可視の状態で存在する。
This substance exists in an invisible state.
見えない is the everyday word for 'cannot be seen', while 不可視 is a formal, technical term.
Compound of 不 (not) + 可 (possible) + 視 (see), literally 'not possible to see'. A Sino-Japanese term used in technical and formal contexts.