PERIODOSCOPE

An Illustrated Encyclopedic Medical Dictionary · 1894 · p. 10

n. Per-i2-o2d'o-skop. From irepioSos, a period, and a-Kowelv, to examine. Of W. T. Smith, an apparatus, consisting of concentric revolving cards, for indicating the dates of menstruation and parturition, [a, 48.J [s. 240]