bullnose step

bullnose

[bool-nohz]
noun
1.
Also, bull's nose. Architecture.
a.
a rounded or obtuse exterior angle, as the corner made by two walls.
b.
a structural member, as a brick, used in forming such an angle.
2.
Also called bullnose step. a step having semicircular or quadrantal ends.

Origin:
1835–45; bull1 + nose

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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