Chamaeleon (the chameleon) is a minor southern constellation that was included in Johann Bayer's Uranometria[?], but may have been in use somewhat earlier.
... Atrial septal defects[?] Atrioventricular septal defect[?] Atrophoderma of Pierini and Pasini[?] ATR-X[?] Attention Deficit Disorder with Hyperactivity[?] ...