Cadaveric a. : Of, pertaining to, or resembling, a corpse, or the changes produced by death; cadaverous; as, cadaveric rigidity.

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Taxonomy
Cadaveric spasm, free encyclopedia, rigidity, rigor mortis, search, cataleptic, violent deaths, happening, intense emotion, muscles, body, forearms, hands, drowning victims, proof of life, Forensics for Dummies, time of entry, forensic investigations.

Defination from the web:
Cadaveric spasm, also known as instantaneous rigor, cataleptic rigidity, or instantaneous rigidity, is a rare form of muscular stiffening that ... Cadaveric spasm is seen in cases of drowning victims when grass, weeds, roots or other materials are clutched, and provides proof of life ...