subvisible

adjective sub·vis·i·ble \ ˌsəb-ˈvi-zə-bəl \
variants: or sub-visible

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

First Known Use of subvisible

1862


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