noun Etymology: International Scientific Vocabulary apo- + -them (from Greek thema something laid down, theme) Date: circa 1856 the perpendicular from the center of a regular polygon to one of the sides
APOTHEM
Meaning of APOTHEM in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012