Ptolemy or Claudius Ptolemaeus (c. 90-c. 168), Alexandrian Greek astronomer, mathematician and geographer, author of the Almagest 天文學大成|天文学大成 / see also 托勒密[Tuo1 le4 mi4]
prop / support (for weight) / rest (e.g. arm rest) / thanks to / to hold in one's hand / to support in one's palm / to give / to base / to commit / to set / torr (unit of pressure)