"ˌ noun
Etymology: semi- + axis
: a line segment that has one endpoint at the center of a geometric figure (as an ellipse) and that forms half of an axis
"ˌ noun
Etymology: semi- + axis
: a line segment that has one endpoint at the center of a geometric figure (as an ellipse) and that forms half of an axis
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012