Black's Law Dictionary (2nd edition)dictionaries

Infra Priesidia

within the protec-tion; within the defenses. In international law, when a prize, or other captured prop-erty, is brought iuto a port of the captors, or within their lines, or otherwise under their complete custody, so that the chance of rescue is lost, it is said to be infra prasidia

Source: Black’s Law Dictionary 2nd Ed (1910)