riprap

Rip"rap`, n. Etym: [Cf. Rap.] (Masonry) Defn: A foundation or sustaining wall of stones thrown together without order, as in deep water or on a soft bottom. Rip"rap`, v. t. [imp. & p. p. Riprapped; p. pr. & vb. n. Riprapping.] Defn: To form a riprap in or upon.

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