Sentence:  &#91;[https://archive.org/stream/standardguidetos00reyn#page/22/mode/1up “The Town”, page 22]&#93; In former times, most of the houses were of <WSD>coquina</WSD> (a loose shell-stone, quarried on the island opposite &#91;w 
Meaning of the word marked with <WSD> tags:  A soft form of limestone made of fragments of shells, sometimes used as a building or road paving material. (from mid 19th c.)