OBLIQUE ANGLE • DICTIONARY ONE.COM • Definition of Oblique angle

... by any, sometimes hidden from sight by the rise and fall of the rough ground, sometimes silhouetted against the sky line, rode a slim, supple figure on a white-faced cow pony. Once, when the fresh morning wind swept down a gulch at an oblique angle, it lifted for an instant from the stirrup leather what might have been a gray flag. But the flag was only a skirt, and it signalled nothing more definite than the courage and devotion of a girl who knew that the men she loved best on earth ...

— Mavericks • William MacLeod Raine