D defs.my
Entry 1 sense Webster, 1913

ovulation

/ōvˌ-yəl-āsh'-ən/ · o·vu·la·tion · IPA /ɑvjəˈleɪʃ(ə)n/
01 n. The formation of ova or eggs in the ovary, and the discharge of the same. In the human female the discharge occurs about halfway between m…
  1. 1.
    The formation of ova or eggs in the ovary, and the discharge of the same. In the human female the discharge occurs about halfway between menstruation times.(Physiol.)