rock armour (English, noun)
expansion: rock armour (countable and uncountable, plural rock armours)
Senses:
glosses: Rock or other suitable material used to protect shorelines, streambeds, bridge abutments, pilings and other structures against scour and water, wave, or ice erosion.
tags: UK
countable
uncountable
Forms:
form: rock armours
tags: plural
form: rock armor
tags: alternative