vigia(redirected from Plukenetia)
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A warning on a navigational chart indicating a possible rock, shoal, or other hazard, the exact position of which is unknown.
[Spanish vigía, from Portuguese vigia, from vigiar, to look out, from Latin vigilāre; see vigilante.]
(Nautical Terms) nautical a navigational hazard marked on a chart although its existence and nature has not been confirmed
[C19: from Spanish vigía reef, from Latin vigilāre to keep watch]