rhumb
/rʌmb/noun
Nautical 【航海】
1
- （亦作rhumb line）an imaginary line on the earth's surface cutting all meridians at the same angle, used as the standard method of plotting a ship's course on a chart恒向线。
2
- any of the 32 points of the compass罗经方位。
词源
late 16th cent.: from French rumb （earlier ryn （de vent） 'point of the compass'）, probably from Dutch ruim 'space, room'. The spelling change was due to association with Latin rhombus （see RHOMBUS）.