Onicofagia means " eat nails " as the nails are not edible, assumes that it is a hobby, but the correct term for the compulsive Act of eating is the nail is onicofagomania, from the Greek 959; 957; 965; 958; ( Onyx, " 34 nail; ) 966; 945; 947; 949; 953; 957; ( fagein, " eat " ) and 956; 945; 957; 953; 945; ( mania, " madness, obsession " ).