What is the word for the sun lights up only the Moons far side?

The phenomenon where sunlight illuminates only the far side of the Moon is referred to as "lunar eclipse" during a total eclipse when the Earth is positioned between the Sun and the Moon. However, when discussing the Moon's phases, the term "new moon" describes the phase when the Moon's far side is lit up and not visible from Earth. In this phase, the illuminated portion faces away from us, making it appear dark.