from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A table or other means of calculating the menstrual cycle.
from the GNU version of the Collaborative International Dictionary of English
- n. A table or other means for calculating the periodical functions of women.
from The Century Dictionary and Cyclopedia
- n. In obstetrics, a dial for calculating the period at which labor will probably occur.
period + -scope (Wiktionary)
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