1. To draw a fluid through a tube by exhausting the air in front. 2. To draw a fluid into the mouth; specifically, to draw milk from the breast. [A.S. sucan]
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suck 'sək vt
1) to draw (as liquid) into the mouth through a suction force produced by movements of the lips and tongue <\sucked milk from her mother's breast>
2) to draw out by suction vi to draw something in by or as if by exerting a suction force esp to draw milk from a breast or udder with the mouth
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(suk) [A.S. sūcan] 1. to draw liquid into a tube or the mouth by creating a partial vacuum, as in taking milk from the breast. 2. to use the lips or mouth parts in a manner resembling the motions of an infant at the breast.Medical dictionary. 2011.