D defs.my
Entry 1 sense Webster, 1913

Menstruation

/mĕnˌ-stro͞o-āsh'-ən/ · Men·stru·a·tion · IPA /ˌmɛnstɹuˈeɪʃən/
01 n. The discharge of the menses; also, the state or the period of menstruating.
  1. 1.
    The discharge of the menses; also, the state or the period of menstruating.