Definition of "breccioid"

A coarse breccioid or large pebbly mass at the base.

1846, Ebenezer Emmons, Agriculture of New-York: Soils‎, page 83

Above these shales we find a light, soft sandstone, sometimes of conglomeratic or breccioid structure, in moderately thick layers.

1916, Johan August Udden, The Thrall Oil Field‎, volume 2, page 10

They are regarded as distal turbidites and are interbedded with bioclastic limestones and massive breccioid limestones containing blocks of coral colonies and intraclasts that are regarded as proximal turbidites.

2007, Bernhard Hubmann, Fossil Corals and Sponges: Proceedings of the 9th International Symposium on Fossil Cnidaria and Porifera, Graz 2003