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a.1.Having no foam.
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References in classic literature ?
With a swift jerk he sculled the flickering boat-head on to a foamless sea that lifted her twenty full feet, only to slide her into a glassy pit beyond.
The sleek-barrelled swell before storm - grey, foamless, enormous, and growing?
Environmentally friendly using a biodegradable and foamless detergent.