Drāg'on's-hĕad, n.

(-hĕd), n. 1. (Bot.) A plant of several species of the genus Dracocephalum. 2. (Astron.) The ascending node of a planet, indicated, chiefly in almanacs, by the symbol ☊.

The deviation from the ecliptic made by a planet in passing from one node to the other, seems, according to the fancy of some, to make a figure like that of a dragon, whose belly is where she has the greatest latitude; the intersections representing the head and tail;—from which resemblance the denomination arises. Encyc. Brit.