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Use "keelless" in a sentence
"The living ratites, with their keelless sternums, are all big gawky wonders with useless little wings."
"Rafts are keelless vessels that are common in many areas of Asia."
"We swept along before the wind, unsteadily, over Lake Chesuncook, at sea in a bowl, -- "rolled to starboard, rolled to larboard," in our keelless craft."