Source : Webster's Revised Unabridged Dictionary (1913)

Caesura \C[ae]*su"ra\, n.; pl. E. {C[ae]suras}, L.
   {C[ae]sur[ae]} [L. caesura a cutting off, a division, stop,
   fr. caedere, caesum, to cut off. See {Concise}.]
   A metrical break in a verse, occurring in the middle of a
   foot and commonly near the middle of the verse; a sense pause
   in the middle of a foot. Also, a long syllable on which the
   c[ae]sural accent rests, or which is used as a foot.

   Note: In the following line the c[ae]sura is between study
         and of.

               The prop | er stud | y || of | mankind | is man.