/ Dictionary / Index P portolano: Meaning and Definition of Find definitions for: por•to•la•no Pronunciation: (pôr"tl-ä'nō, pōr"-), [key] — pl. -nos, -ni a descriptive atlas of the Middle Ages, giving sailing directions and providing charts showing rhumb lines and the location of ports and various coastal features. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Port-of-Spain Porto Novo Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language