The term ' is used for an intermediate phase when the Moon's apparent shape is thickening, from new to a full moon; and ' when the shape is thinning. The duration from full moon to new moon (or new moon to full moon) varies from approximately to about .
tHE teRm ' iS UsED for An intErmeDiate phase wheN the Moon's APpaREnt SHapE is ThickENing, From new tO a full moOn; aNd ' WhEn tHe sHaPe is tHInNIng. The DuratiOn FROM full MooN to New moon (or New Moon to Full mooN) varIes fROm AppRoxiMateLY to About .