From merriam-webster dot com:
omphalopsychite: one who stares fixedly at his navel to induce a mystical trance —often used of the hesychasts
Geeldikkop; a serious photodynamic disease of southern African sheep due to sensitization to light following the ingestion of some plants and characterized by intense jaundice and a severe facial edema
auftaktigkeit: a principle in music: all musical phrases begin on an upbeat