英语词汇pulsar的起源、历史背景-英语词源词典

词汇	pulsar
词源	pulsar n. "highly magnetized, rotating compact star that emits beams of electromagnetic radiation," 1968, from pulse (n.1), the form on analogy of quasar. When discovered in 1967 via radio telescope, they were thought perhaps to be signals from alien civilizations and astronomers informally dubbed them LGM for "Little Green Men." Entries linking to pulsar pulse n.1 "a throb, a beat, a stroke," especially a measured, regular, or rhythmical beat, early 14c., from Old French pous, pulse (late 12c., Modern French pouls) and directly from Latin pulsus (in pulsus venarum "beating from the blood in the veins"), past participle of pellere "to push, drive" (from PIE root *pel- (5) "to thrust, strike, drive"). Extended usages, of feeling, life, opinion, etc., are attested from early 16c. The figurative use for "life, vitality, essential energy" is from 1530s. quasar n. 1964, from "quas(i-stell)ar radio source" (1963); see quasi- + stellar. So called because they resembled stars in photographic images; now thought to be massive, distant, extremely luminous active galactic nuclei. updated on February 01, 2021
随便看	corroboration corrode corrosion corrosive corrugate corrugated corrugation corrupt corruptible corruption corsage corsair corse corselet corset corsetier corsica cortege cortes cortex cortical cortico- corticoid corticole corticosteroid

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pulsar n.