Quarter round : An ovolo.

Example:


Taxonomy
Quarter round, flooring industry, free encyclopedia, baseboard, search, Unsourced, convex molding, cross section, quarter circle, ellipse, requirement, United States, aesthetic appeal, edge, natural hardwood, architectural element, Personal tools, Interaction.

Defination from the web:
Quarter round, a term typically used in the flooring industry, is a convex molding that has a cross section in ... Quarter round is typically sold in various materials such as natural hardwood, engineered hardwood and laminate. This architectural element-related article is a stub. ...