lauritsen electroscope

\\ˈlau̇]rə̇tsən-, ˈlȯ], ˈlä]\ noun

Usage: usually capitalized L

Etymology: after Charles C. Lauritsen died 1968 and Thomas Lauritsen b1915 American physicists born in Denmark, who designed it

: an electroscope in which the sensitive element is a quartz fiber used in precise measurements of ionizing radiation