The Collaborative International Dictionary of English v.0.48:

Lacerate \Lac"er*ate\, Lacerated \Lac"er*a`ted\, p. a. [L.
   laceratus, p. p.]
   1. Rent; torn; mangled; as, a lacerated wound.
      [1913 Webster]

            By each other's fury lacerate         --Southey.
      [1913 Webster]

   2. (Bot. & Zool.) Jagged, or slashed irregularly, at the end,
      or along the edge.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lacerate \Lac"er*ate\, v. t. [imp. & p. p. Lacerated; p. pr. &
   vb. n. Lacerating.] [L. laceratus, p. p. of lacerare to
   lacerate, fr. lacer mangled, lacerated; cf. Gr. ? a rent,
   rending, ? to tear; perh. akin to E. slay.]
   To tear; to rend; to separate by tearing; to mangle; as, to
   lacerate the flesh. Hence: To afflict; to torture; as, to
   lacerate the heart.
   [1913 Webster] Lacerate

WordNet (r) 3.0 (2006):

lacerate
    adj 1: irregularly slashed and jagged as if torn; "lacerate
           leaves" [syn: lacerate, lacerated]
    2: having edges that are jagged from injury [syn: lacerate,
       lacerated, mangled, torn]
    v 1: cut or tear irregularly
    2: deeply hurt the feelings of; distress; "his lacerating
       remarks"

Moby Thesaurus II by Grady Ward, 1.0:

107 Moby Thesaurus words for "lacerate":
   abrade, afflict, agonize, ail, bark, bite, blemish, bloody, break,
   burn, chafe, check, chip, claw, convulse, crack, craze, crucify,
   cut, defoliate, denude, dismember, distress, draw and quarter,
   excruciate, fester, flay, fracture, fray, frazzle, fret, gall,
   gash, give pain, gnaw, grate, grind, gripe, harrow, hurt, impale,
   incise, inflame, inflict pain, injure, irritate, kill by inches,
   lancinate, macerate, maim, make mincemeat of, mangle, martyr,
   martyrize, maul, mutilate, nip, pain, peel, pick to pieces, pierce,
   pinch, prick, prolong the agony, pull apart, puncture, punish,
   put to torture, rack, rankle, rasp, rend, rip, rub, run, rupture,
   savage, scald, scarify, scorch, scotch, scrape, scratch, scuff,
   shred, skin, slash, slit, sprain, stab, stick, sting, strain,
   strip, take apart, tear, tear apart, tear to pieces,
   tear to tatters, torment, torture, traumatize, tweak, twist, wound,
   wrench, wring