Source : Webster's Revised Unabridged Dictionary (1913)

Lanciname \Lan"ci*name\, v. t. [imp. & p. p. {Lancinated}; p.
   pr. & vb. n. {Lancinating}.] [L. lancinatus, p. p. of
   lancinare to fear.]
   To tear; to lacerate; to pierce or stab. --De Quincey.

Lancinating \Lan"ci*na`ting\, a.
   Piercing; seeming to pierce or stab; as, lancinating pains
   (i.e., severe, darting pains).

Source : WordNet®

lancinating
     adj : as physically painful as if caused by a sharp instrument; "a
           cutting wind"; "keen winds"; "knifelike cold";
           "piercing knifelike pains"; "piercing cold"; "piercing
           criticism"; "a stabbing pain"; "lancinating pain" [syn:
            {cutting}, {keen}, {knifelike}, {piercing}, {stabbing},
            {lancinate}]