Possible misspelling? More dictionaries have definitions for
pleio
-- could that be what you meant?
perfectly level expanse so ingeniously overgrown
The sultry afternoon was already far advanced, when the weary eye was refreshed by a glimpse of the verdant plain of Sultélli, a perfectly level expanse, so ingeniously overgrown with pale green vegetation as to furnish an exact representation of a wide lake covered with floating duckweed, around which numerous camels were busily browsing on the rank herbage. — from The Highlands of Ethiopia by Harris, William Cornwallis, Sir
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