This is a moon phase between the New moon and the third quarter where the moon is decreasing and has the shape of the letter “C” with it being illuminated from the left while its dark part is on the right.

Illuminating Terminologies
This is a moon phase between the New moon and the third quarter where the moon is decreasing and has the shape of the letter “C” with it being illuminated from the left while its dark part is on the right.