D defs.my
Entry 1 sense Webster, 1913

Semi-

· Sem·i- · IPA /sɛmi/
01 A prefix signifying half, and sometimes partly or imperfectly; as, semiannual, half yearly; semitransparent, imperfectly transparent.
  1. 1.
    A prefix signifying half, and sometimes partly or imperfectly; as, semiannual, half yearly; semitransparent, imperfectly transparent.