noun, plural por·to·la·nos, por·to·la·ni [pawr-tl-ah-nee, pohr-]. /ˌpɔr tlˈɑ ni, ˌpoʊr-/.
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Example sentences from the Web for portolano
In the fourteenth century the map of Edrisi was superseded by the new Italian plans and coast-charts, or Portolani.
Strictly scientific map-making begins with the Mediterranean portolani.
Nor do the earliest portolani contain any compass-roses or wind-roses.
This is the most remarkable of all the Portolani of the fourteenth century.