Lacerum or lacer from Latin may refer to:
In anatomy and medicine: Foramen lacerum, a triangular hole in the base of the skull Lacerum segment, a part of the course of the internal carotid artery In biology: Animals: Lepton lacerum, a species of saltwater clam in the family Lasaeidae Plants: Trichocentrum lacerum, a species of orchid found from Central America to Colombia Moxostoma lacerum or Harlip sucker, an extinct species of ray-finned fish in the family Catostomidae