Of a valley, river, etc.: crossing a fold; passing through an anticline or syncline.

Of a valley, river, etc.: descending in a direction opposite to the dip of the underlying rocks.

(See quot. 1875.) Cf. anaclinal, adj.

Geology. (See quots. 1904 1960.)

Physical Geography. Of a stream, valley, etc.: having a direction or character determined by the resistance to erosion of the underlying rock, and…

Of a stream, stream valley, or drainage pattern: having a course or character opposite to that of a consequent stream, stream valley, or drainage…

Of a stream, stream valley, or drainage pattern: having a course or form that appears haphazard and exhibits no apparent relation to the form or…

Designating, or characterized by the presence of, a stream or streams whose course follows the dip of strata (in the manner of a consequent…