The ASAP Dictionary of Anxiety and Panic Disorders
J

Jamais Vu - a sense that something familiar is being encountered for the first time. Contrast with deja vu.

Jitters - extreme nervousness, sometimes with shaking.

JND - acronym for "just noticeable difference."

Jungian - relating to the psychological theories of Carl Gustav Jung (1875-1961).

The ASAP Dictionary of Anxiety and Panic Disorders