Definitions Found:
PORTULAN, a Middle Ages navigation manual
- portulansPORTULAN, a Middle Ages navigation manual
- portolano(Italian) in the Middle Ages, a navigation manual also PORTOLAN, PORTULAN
- portolanosPORTOLANO, (Italian) in the Middle Ages, a navigation manual also PORTOLAN, PORTULAN
- portolaniPORTOLANO, (Italian) in the Middle Ages, a navigation manual also PORTOLAN, PORTULAN
- portolana Middle Ages navigation manual
- portulana Middle Ages navigation manual
- portolansPORTOLAN, a Middle Ages navigation manual
- astrolabeastronomical instrument for taking the altitude of the sun or stars and for the solution of other problems in astronomy and navigation: used by Greek astronomers from about 200 b.c. and by Arab astronomers from the Middle Ages until superseded by the sext