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am·plex·us | \ am-ˈplek-səs 
\
\Definition of amplexus
: the mating embrace of some amphibians (such as frogs and toads) in which the male typically takes a position on the back of the female and tightly grasps onto the female with his front legs
Frogs mate in a position called amplexus, with the smaller male clasping the female from behind in a ride that can last two days or more. As she lays eggs, he expels sperm to fertilize them.— Mel White
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Time Traveler for amplexus
The first known use of amplexus was in 1900
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