Source : Webster's Revised Unabridged Dictionary (1913)

Scirrhus \Scir"rhus\, n.; pl. L. {Scirrhi}, E. {Scirrhuses}.
   [NL., from L. scirros, Gr. ?, ?, fr. ?, ?, hard.] (Med.)
   (a) An indurated organ or part; especially, an indurated
       gland. [Obs.]
   (b) A cancerous tumor which is hard, translucent, of a gray
       or bluish color, and emits a creaking sound when incised.
       [Sometimes incorrectly written {schirrus}; written also
       {skirrhus}.]

Source : WordNet®

scirrhi
     See {scirrhus}