nonnetje

Etymology
lit. 'little nun'.
 * The sense "smew" is derived from the black and white coloring of the male's plumage.
 * The sense "mollusk" is said to derive from fishermen's slang, alluding to nuns' chastity: reportedly, the clam is difficult to open with the tongue.

Noun

 * 1)   The smew, a type of merganser,
 * 2)  The, , ,  syn.
 * 1)  The, , ,  syn.
 * 1)  The, , ,  syn.