being of crucial importance; "a pivotal event"; "Its pivotal location has also exposed it to periodic invasions"- Henry Kissinger; "the polar events of this study"; "a polar principal"
United States diplomat who did the groundwork for creating the United Nations (1871-1955)
United States naval officer who commanded the `Constitution' during the War of 1812 and won a series of brilliant victories against the British (1773-1843)
persistent enlarged calyx at base of e.g. a strawberry or raspberry