Semi-

[Latin semi; akin to Greek {not transcribed}, Sanskrit sāmi-, Anglo-Saxon sām-, and prob. to English same, from the division into two parts of the same size. Compare Hemi-, Sandelend.]

A prefix signifying half, and sometimes partly or imperfectly; as, semiannual, half yearly; semitransparent, imperfectly transparent.

The prefix semi is joined to another word either with the hyphen or without it. In this book the hyphen is omitted except before a capital letter; as, semiacid, semiaquatic, semi-Arian, semiaxis, semicalcareous.