D defs.my
Entry 1 sense Webster, 1913

Dimidiation

/dĭmĭ'dĭāʹshən/ · Di·mid·i·a·tion · IPA /dɪˌmɪdɪˈeɪʃən/
01 n. The act of dimidiating or halving; the state of being dimidiate.
  1. 1.
    The act of dimidiating or halving; the state of being dimidiate.