Clark cell

noun

physics a cell having a mercury cathode surrounded by a paste of mercuric sulphate and a zinc anode in a saturated solution of zinc sulphate. Formerly used as a standard, its emf is 1.4345 volts

Word Origin

C19: named after Hosiah Clark (died 1898), English scientist

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012