noun Etymology: New Latin, literally, straight side Date: 1702 a chord of a conic section (as an ellipse) that passes through a focus and is parallel to the directrix
LATUS RECTUM
Meaning of LATUS RECTUM in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012