SINCE 1828
subvisual
adjective
sub·vi·su·al
| \ ˌsəb-ˈvi-zhə-wəl,
-zhəl; -ˈvizh-wəl\
-zhəl; -ˈvizh-wəl\
variants:
or sub-visual
Definition of subvisual
: not visible without the aid of special instruments : subvisible
… once you have seen the subvisual world through the microscope, you stop inventing demons and magic as the agents of change.— Dava Sobel Auroras have a wide range of brightness, usually rated from 0 to 4 on a logarithmic scale … in which each number is 10 times brighter than the previous one. Zero means subvisual, detected only with instruments.— Robert H Eather
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