corbiestep

Wiktionary

1. n. A series of step-like projections at the top of a gable.

GNU Webster's 1913

1. n. One of the steps in which a gable wall is often finished in place of a continuous slope; -- also called crowstep.

WordNet 3.0

1. n. (architecture) a step on the top of a gable wall
2. n. (architecture) a step on the top of a gable wall