United States astronomer who discovered that sunspots are associated with strong magnetic fields (1868-1938)
a soldier of the American Revolution who was hanged as a spy by the British; his last words were supposed to have been `I only regret that I have but one life to give for my country' (1755-1776)
exhibiting or restored to vigorous good health; "hale and hearty"; "whole in mind and body"; "a whole person again"
marked by active interest and enthusiasm; "an avid sports fan"; "a great walker"; "an eager beaver"
(often followed by `for') ardently or excessively desirous; "avid for adventure"; "an avid ambition to succeed"; "fierce devouring affection"; "the esurient eyes of an avid curiosity"; "greedy for fame"
absolutely required and not to be used up or sacrificed
absolutely necessary; vitally necessary; "essential tools and materials"; "funds essential to the completion of the project"; "an indispensable worker"
being or relating to or containing the essence of a plant etc; "essential oil"