PERIODOSCOPE

Meaning of PERIODOSCOPE in English

ˌpirēˈädəˌskōp noun

Etymology: period (I) + -o- + -scope

: a table or dial for calculating the probable date of parturition

Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012

PERIODOSCOPE — (n.) A table or other means for calculating the periodical functions of women.
Английский словарь Webster
PERIODOSCOPE — ( n. ) A table or other means for calculating the periodical functions of women.
Webster's Revised Unabridged English Dictionary
PERIODOSCOPE — noun a table or other means for calculating the periodical functions of women.
Webster English vocab