up vote 1 down vote. 2D cross products are more properly called 2d wedge products. Wedge products generalize to other dimensions, but cross products are always 3d wedge products. The usual operator symbol for a wedge product is ^ . You can use 2d wedge products to determine if one vector is to the left or the right of another one. If vector A is to the right of vector B, then, if A is to the left. If they are parallel or either of them is 0, then A ^ B = 0. In vector graphics, 2d wedge products can be used to analyze the intersection of 2 parametrized curves, e.g. for removing portions of one curve that lies to the right of another.
Definition of morning star for Students. : a bright planet (as Venus) seen in the eastern sky before or at sunrise.
Old English, from Latin LÅ«cifer, light-bearer, from lÅ«x light + ferre to bear. Word Origin and History for Lucifer. Old English Lucifer Satan, also morning star, from Latin Lucifer morning star, literally light-bringing, from lux (genitive lucis) light (see light (n.)) + ferre carry (see infer).