valitudinarian an invalid, hypochondriac. clavus (psychiat.) a headache which feels like a sharp object has been driven into the skull, often considered a symptom of hysteria. prosodemic pertaining to a disease spread by personal contact. festination a gait characterized by involuntary hurrying. (from adj. |festinate|) ptisan a barley-water potion of supposed medicinal value. hyperprosexia (psychol.) excessive and involuntary attention to a particular stimulus. sjambok a heavy rhinoceros-hide whip. (southern Africa) caries [