noun
Usage: usually capitalized G
Etymology: after Sir Francis Galton, its inventor
: a whistle of variable high pitch used to test the upper limit of audibility
noun
Usage: usually capitalized G
Etymology: after Sir Francis Galton, its inventor
: a whistle of variable high pitch used to test the upper limit of audibility
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012