Source : Webster's Revised Unabridged Dictionary (1913)

Incisure \In*cis"ure\ (?; 277), n. [L. incisura: cf. F.
   incisure.]
   A cut; an incision; a gash. --Derham.

Source : WordNet®

incisure
     n : (anatomy) a notch or small hollow [syn: {incisura}]