Polaris
/pəʊˈlɑːrɪs/1
- Astronomy the Pole Star【天文】北极星。
2
- a type of submarine-launched ballistic missile designed to carry nuclear warheads, formerly in service with the US and British navies北极星导弹（曾在美国和英国海军中被应用的一种用于携带核弹头的潜射弹道导弹）。
词源
mid 19th cent.: from medieval Latin polaris 'heavenly', from Latin polus 'end of an axis'.