释义
n.
a small venomous Eurasian snake which has a dark zigzag pattern on its back and bears live young. It is the only poisonous snake in Britain.
极北蝰。亦称<Bold>VIPER</Bold>.
used in names of similar or related snakes, e.g. death adder, puff adder
[用 于类似或相关蛇类名称中,如death adder, puff adder] 。
n.
Electronics a unit which adds together two input variables. A full adder can add a bit carried from another addition as well as the two inputs, whereas a half adder can only add the inputs together.
【电子】 加法器。
词源
"Old English nædre ‘serpent, adder', of Germanic origin; related to Dutch adder and German Natter. The initial n was lost in Middle English by wrong division of a naddre; compare with APRON, AUGER, and UMPIRE."