[ULPIANUS libro sexagensimo octauo ad edictum. ] §50.16.59.pr'Portus' appellatus est conclusus locus, quo importantur merces et inde exportantur: eaque nihilo minus statio est conclusa atque munita.
[ULPIANUS on the Edict, book 68.] 'portus' is defined as a closed place, into which merchandise is imported and from which it is exported; and it is nonetheless a 'statio' which is closed and fortified.
inde 'angiportum' dictum est.
From this, 'angiportum' was derived.