riprap

[rip-rap]
noun
  1. a quantity of broken stone for foundations, revetments of embankments, etc.
  2. a foundation or wall of stones thrown together irregularly.
verb (used with object), rip·rapped, rip·rap·ping.
  1. to construct with or strengthen by stones, either loose or fastened with mortar.

Origin of riprap

First recorded in 1570–80; gradational reduplication of rap1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for riprap

Historical Examples of riprap