suckling

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suckling

an infant that has not been weaned.

suck·ling

(sŭk'ling)
An early oral intake pattern seen in infants whose lower jaw and tongue elevate as a unit and thereby place pressure on the nipple to obtain liquid nourishment. This is followed by the tongue's moving in a forward-back action drawing the liquid into the mouth and moving it back to the rear of the oral cavity for swallowing.

suckling

the nursing of the young by the dam; the young animal so nursed.