名詞 mallard:

1. wild dabbling duck from which domestic ducks are descended; widely distributed
   同義詞：Anas platyrhynchos

1. Any of a breed of common domestic ducks descended from and resembling the mallard.
   魯昂鴨一種與綠頭鴨相似并是其后代的普通家養(yǎng)鴨

mal.lard

n.（名詞）
【復(fù)數(shù)】 mallard 或 mal.lards
A wild duck(Anas platyrhynchos) of which the male has a green head and neck. Most domestic ducks descend from the mallard.
綠頭鴨：一種野鴨（綠頭鴨） ，其雄鳥具有綠色的頭和頸。大部分馴化了的家鴨都是綠頭鴨的后裔

來源：
Middle English malarde
中古英語 malarde
from Old French mallart
源自 古法語 mallart
perhaps from male [male] * see male
可能源自 male [雄性的] *參見 male
-ard [-ard,]
-ard [后綴]
or possibly of Germanic origin
或可能為 日耳曼語語源