Definition of subvisible
: not visible without the aid of special instruments
- subvisible particles
- subvisible cirrus clouds
- For Great Lakes fishermen, the immediate threat is not the thumb-size grown-ups but the subvisible larvae they spawn by the tens of thousands. Off the shores of Toledo and Cleveland and near Leamington, Ont., a single cubic meter of water often contains a half-million mussel larvae.
- —Geoffrey Cowley
