Wallace's line 
Zoology
A hypothetical line, proposed by Alfred Russel Wallace, marking the boundary between the Oriental and Australian zoogeographical regions. Wallace’s line is now placed along the continental shelf of SE Asia. To the west of the line Asian mammals predominate, while to the east of it the fauna is dominated by marsupials.
- mercury arc lamp
- mercury arc rectifier
- mercury fulminate
- mercury gilding
- mercury lamp
- mercury pool
- mercury porosimetry
- mercury pump
- mercury sublimate
- mercury sulfide
- mercury sulphide
- mercury-tilt
- mercury tilt switch
- mercury vapor light
- mercury vapor pump
- mercury vapor rectifier
- mercury vapor tube
- mercury vapour lamp
- mercury vapour light
- mercury vapour pump
- mercury vapour rectifier
- mercury vapour tube
- mercy
- mercy dash
- mercy-kill