NAIL BITING By N., Sam M.S. - 3 is the habitual biting of ones fingernails. Otherwise known as onychophagia. NAIL BITING: "Nail biting is a habit which is observed during intervals of boredom or anxiety." Related Psychology Terms HABIT Comparison of Assessment Tools ORAL CHARACTER CHILD PSYCHIATRY SULLIVAN, HARRY STACK (1892- 1949) ADOLESCENCE (Theories) EARLY INFANTILE AUTISM REGRESSION DREAM-STATE (D-STATE, REM- STATE) DEMONOLOGY Cite this page: N., Sam M.S., "NAIL BITING," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/nail-biting/ (accessed June 26, 2022).